Lot or
Loth is the eponymous king of
Lothian in the
Arthurian legend. He is best known as the father of Sir
Gawain. Such a ruler first appeared late in the 1st millennium's
hagiographical material concerning
Saint Kentigern (also known as Saint Mungo), which feature a
Leudonus, king of
Leudonia, a Latin name for Lothian. In the 12th century,
Geoffrey of Monmouth adapted this to Lot, king of Lothian, in his influential chronicle
Historia Regum Britanniae, portraying him as
King Arthur's brother-in-law and ally. In the wake of Geoffrey's writings, Lot appeared regularly in later romance.