A 4
- Adam (biblical) being
- Archbishop of Logres being
- Arthur (king of Logres) being
- Arthurian knight (unnamed) being
B 4
- Ban (king of Benoic) being
- Barons of Logres being
- Bretagne (Britain) place
- Britannia (Britain) place
C 6
- Cheldric (of Saxony) being
- Cirencester place
- Conanus being
- Constant (monk-king) being
- Constantine (British king) being
- Constantine (son of Cador) being
D 3
- Damsel (Prose Merlin) being
- Devil (Prose Merlin) being
- Dinabus being
E 2
- Eldof (Earl) being
- Eve (biblical) being
G 6
H 1
- Holy man (Prose Merlin) being
J 1
- Jesus Christ being
K 1
- Kay (seneschal) being
L 5
- Lake Lomond place
- Logres (Arthur's kingdom) place
- Lot (King of Norway) being
- Lucan (Arthurian knight) being
- Lucius (Roman Emperor) being
M 6
- Merlin (prophet) being
- Merlin's mother being
- Merlinus (Merlin, prophet-king of the Britons) concept
- Mordred being
- Morgen (Morgan le Fay, healer of Avalon) being
- Morholt (Irish knight) being
O 1
- Octa (son of Hengist) being
P 2
R 3
- Rion (pagan king) being
- Rodarcus (Rhydderch, King of Cumbria) place
- Round Table object
S 2
T 2
U 1
- Uther Pendragon being
W 2
- Wace (author) being
- Welsh concept