XANTHUS, river of Asia Minor
Y
YAMA, Hindu god of the Infernal Regions
YEAR, THE
YGDRASIL, great ash-tree, supposed by Norse mythology to support the universe
YMIR, giant, slain by Odin
YNYWL, Earl, host of Geraint, father of Enid
YORK, Britain
YSERONE, niece of Arthur, mother of Caradoc
YSPA DA DEN PEN'KAWR, father of Olwen