What was the name of Arthur's kingdom?

What was the name of Arthur’s kingdom? Arthur’s kingdom was called Logres.

Logres is the name given to King Arthur’s realm in several medieval Arthurian romances. The term usually refers broadly to southern and eastern England, though its boundaries and meaning vary between authors. In some texts, Logres describes the whole realm; in others, it can refer to a particular territory or even a capital city.

The name is related to the medieval Welsh word Lloegyr, traditionally used for England. Geoffrey of Monmouth’s Latin form, Loegria, influenced later versions such as the French Logres. Geoffrey also connected the name with Locrinus, the legendary son of Brutus of Troy, although that is a mythic genealogy rather than established history.

Logres is often confused with Camelot. Camelot is generally Arthur’s court or principal seat, not the name of his entire kingdom. Albion is an older poetic name for Britain, while Britannia is a Latin geographical term. Later writers, including Thomas Malory, often used “England” instead of Logres, which helps explain the variation across Arthurian stories.