- 12 Grimmauld Place (PotterGrangerous)
- 12¾", Walnut, dragon heartstring
- 1928 seige of Leutus Hall (TN)
- 1973 (Hunter's Melody)
- 1991–1992 school year (LOTW)
- 2010 Quidditch World Cup (Scopatore)
- 2014 Quidditch World Cup (Nemolee.exe)
- 2014 Quidditch World Cup Qualifiers (Nemolee.exe)
- 2014 Quidditch World Cup Qualifiers (Nemolee.exe)/UEQA/Group A
- 2014 Quidditch World Cup Qualifiers (Nemolee.exe)/UEQA/Group B
- 2014 Quidditch World Cup Qualifiers (Nemolee.exe)/UEQA/Group C
- 2018 Quidditch World Cup Qualifiers (Nemolee.exe)
- 2021 Hogwarts Halloween Concert (The Eternal Wayfarer)
- A Better Place
- A Black Comedy
- A Black Guardian Angel
- A Broken Soul
- A Change of Plans (short story)
- A Christmas Carol
- A Clandestine Reality
- A Cost Too Much
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- A Family Like None Other
- A Hero
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- A Keen Observer
- A Peccatis
- A Perfectly Potent Potion (short story)
- A Plan for Slytherin
- A Simple Twist Of Fate
- A Slant-Told Tale (novel)
- A Summer Like None Other
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- A Weasley Christmas
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- A Year Like None Other
- A Year in the Life
- Aaron Blackwell (The Eternal Wayfarer)
- Abandinus (LOTW)
- Abbott Manor (ASTOF)
- Abdul Alhazred (COE)
- Aberforth Dumbledore (Hunter's Melody)
- Aberration
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- Abraxan (Lord Caesar)
- Abraxan tail hair (Mal-man)
- Absalon Dumbledore (MasterOfDwarves)
- Accipite Mentis (Kaaterskill Chronicles)
- Accroître Momentum (OD)
- Achilles Peverell (COTB)
- Acilo (CV)
- Acrimonium (ASTOF)
- Actoria Augusta (LOB)
- Actoria gens (LOB)
- Ada Schmidt (QOTH)
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- Adam Davies (Hogwarts Mystery)
- Adam Fox's wand (Reynoman)
- Adam Fox (Reynoman)
- Adamant (LOTW)
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- Adonai (BOTP)
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- Adric Walsh (Ajrand)
- Aenean Church (DM)
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- Afghani National Quidditch team (Nemolee.exe)
- AfterMagic
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- Age-regression spell (BlueKraid)
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- Agency of Magical Transportation (Thatcher series)
- Agilbert Fontaine (CI)
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- Aion (LOTW)
- Aisling Malfoy-Potter (Demon's Breath)
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- Akaviri Dragonguard (RS)
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- Albanian National Quidditch team (Nemolee.exe)
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- Albus Dumbledore: Expiation
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- Albus Dumbledore (Hunter's Melody)
- Albus Dumbledore (Lord Caesar)
- Albus Dumbledore (Lord Dumbledore)
- Albus Dumbledore (Scopatore)
- Albus Dumbledore and the Everlasting Flame
- Albus Dumbledore and the Phoenix Feather
- Albus Dumbledore and the Wizard's Ruse
- Albus Potter
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- Albus Potter and the Dragonfang Wand
- Albus Potter and the Dungeon of Merlin's Mist
- Albus Potter and the Eagle's Watch
- Albus Potter and the Fortress of the Dead
- Albus Potter and the Foulest Book
- Albus Potter and the Rise of the Dark Alliance
- Albus Potter and the Silver Wizard
- Albus Potter and the Sorting of the Students
- Albus Potter and the Year of the Badger
- Aldis (GATS)
- Alec Evans (Kaaterskill Chronicles)
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- Aleister Fontaine (MP series)
- Alessandro Andolini (Scopatore)
- Alex John (Shadow North)
- Alex Mihalios (Scopatore)
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- Alexander John-Larson (Scopatore)
- Alexander Morrison's relationships (Skullguy123)
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- Alexander Morrison (Skullguy123)
- Alexander Potter (THE)
- Alexander Prince (Hunter's Melody)
- Alexander Zhuvinsky (XNDUIW Simon)
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- Alexandra Potter (Scopatore)
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- Alexandra Quick series
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- Alexios (disambiguation)
- Alexios VII Anemas (DM)
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- Aliens and Strangers
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- All Favor Potion
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- Allagízvieramagus
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- Allegra Lovegood (Hunter's Melody)
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- Allison Feret (Kaestal)
- Allosaurus (Lord Caesar)
- Aloisius Potter, 7th Duke of Inverness (DM)
- Alone and Palely Loitering (short story)
- Alphard Black (ASTOF)
- Altered Destinies
- Aluria (TFJ)
- Alurites (TFJ)
- Always
- Always Second
- Alya (QOTH)
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- Amanda Abrams (Lord Caesar)
- Amaranth (EOTN)
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- Amber League (CV)
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- Amerindian magic (Kerapac)
- Amiel II of Nu-Cyrod (RS)
- Amiel I of Nu-Cyrod (HTTE)
- Amiel XX of Nu-Cyrod (RS)
- Amilanius's mother (DM)
- Amilanius (DM)
- Ammon Lightarrow (Reynoman)
- Amortality
- Amos Ravensdale (WR)
- Ampaloperion I (DM)
- Amphitrion Sounders (SSK)
- Amulet of Kings (ROC)
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- Amy Tonks (MotHE)
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- Ancestral Sovereigns (CV)
- Ancestrials (LOTW)
- Ancient Egypt (THE)
- And the World Stood Still
- Andratha of Syriri-Hassi (EOTN)
- Andrea Prince (Things Use to be in Harmony)
- Andreiko Igorobravitch (Shadow North)
- Andrew Potter, 5th Duke of Inverness (DM)
- Andromeda Tonks
- Andromeda Tonks: Story Time
- Andromeda Tonks (Hunter's Melody)
- Andronicus Potter, 9th Duke of Inverness (DM)
- Andronikos III Palaiologos (DM)
- Andros Prince-Slytherin (Hunter's Melody)
- Angelat (Species) (HPR1)
- Angelic Choirs (BOTP)
- Angelina Johnson: Getting Out of Bed
- Angelina Johnson (Scopatore)
- Angelina Johnson (Some Well Thought Out Meddling)
- Angelina Vanilladime (STW)
- Angelo Seven (Scopatore)
- Anger
- Anglo-Cyrodilic protocol (RS)
- Aniel III Ru (LOTW)
- Aniel II Ru (LOTW)
- Aniel I Ru (LOTW)
- Animagus
- Animagus (Lord Caesar)
- Animagus Club (Lord Caesar)
- Anipheon (disambiguation)
- Anipheon IX (DM)
- Anipheon I (DM)
- Anipheon X (DM)
- Ankylosaurus (Lord Caesar)
- Anna Grayson and the Order of Merlin
- Anna Winterbourne (HPMU)
- Annabelle's Hogwarts Adventure
- Annabelle Kelley (MWLL)
- Anne Findlay (Kaaterskill Chronicles)
- Anneliese Zabini (Hunter's Melody)
- Another Part of the Castle (1996) (short story)
- Anthony Davis (Pidoria)
- Anthony De Santa II (Scopatore)
- Anthony Frazier (BlackWolf100k)
- Anthro-Dragon (Lord Caesar)
- Anti-Wizard-Detecting Spell (PotterGrangerous)
- Antioch Peverell (Ajrand)
- Antipater (DOTE)
- Antipatros (MOTO)
- Antoine Maximoff (Scopatore)
- Antoinette Topaz (Lion’s Tale)
- Antonio (Reynoman)
- Antonius Potter, 4th Duke of Inverness (DM)
- Antonius Potter (PotterGrangerous)
- António Salazar (DM)
- Anuanth (EOTN)
- Apatosaurus (Lord Caesar)
- Apolline Delacour (Scopatore)
- Apparition Administration (Ajrand)
- Apples and Ravens
- Apples and Snakes
- Apples and Snakes (Trilogy)
- Appraiser of the Wayward Whims (DM)
- April Granger (TN)
- Aquarius Prince-Slytherin (Hunter's Melody)
- Aquila Malfoy (Silver Ghost AU)
- Aquila Malfoy (Vela)
- Arabella Larkin (SSK)
- Arabella Snape (PurpleGirl)
- Arabesque
- Arabian Academy of Magic
- Aratron (DOB)
- Arcatar (disambiguation)
- Arcatar religion (EOTN)
- Arcatar species (EOTN)
- Arcedemus (WR)
- Archaeopteryx (Lord Caesar)
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- Area 51 (Lord Caesar)
- Argent family (Raveela)
- Argentinian Council of Magic (Vincent Mackay)
- Ariabelle Durbridge (Mal-man)
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- Ariel Black (Pleiades)
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- Arithmancy (Bryona)
- Arkady Tvaichkolenko (XNDUIW Simon)
- Arkos (Ajrand)
- Arresto Momentum (spell)
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- Arron Durbridge (Mal-man)
- Artaxianate (GATS)
- Artaxias (GATS)
- Artaxias XII (GATS)
- Artemis (Artemis Chronicles)
- Artemis Black (Pleiades)
- Artemis Black (Vela)
- Artemis Potter -Two Worlds Colide.
- Arthur Britannia (CaptainFlowerss)
- Arthur Weasley (Hunter's Melody)
- Arthur Weasley II (Prince's World)
- Arthur Weasley II (Scopatore)
- Asamad La Pette (ASTOF)
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- Ashley Malfoy (KiwiVerse)
- Ashlyn Black (DLD)
- Asia Crane (Hunter's Melody)
- Asmodeus Filius Dei (COE)
- Assassination of Malcolm Rothes (GATS)
- Assassination of Michael Sounders (SSK)
- Asta Lestrange (Clover Charms)
- Asteria Malfoy (The Eternal Wayfarer)
- Astoria Greengrass
- Astoria Greengrass (Sweets)
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