Afallach (
Old Welsh Aballac) is a man's name found in several medieval Welsh genealogies, where he is made the son of
Beli Mawr. According to a medieval Welsh
triad,
Afallach was the father of the goddess
Modron. The Welsh redactions of
Geoffrey of Monmouth's
Historia Regum Britanniae,
Brut y Brenhinedd, associate him with
Ynys Afallach, which is substituted as the Welsh name for Geoffrey's
Insula Avalonsis (Island of
Avalon), but this is fanciful medieval etymology and it is more likely his name derives from the
Welsh word
afall "apple tree" (modern Welsh
afal "apple", afalllen "apple tree" cf.
Proto-Celtic *
aballo- "apple"); from which, granted, the name of Avalon is also often thought to derive, so that the meaning of "Afallach" is associated but not necessarily directly.