
1) Mythological pig 2) Welsh boy name 3) Welsh legendary creature
Found on
https://www.crosswordclues.com/clue/ysgithyrwyn

Ysgithyrwyn Chief Boar (Gwen Jones tr.), Yskithyrwyn Benbaedd (Lady Guest tr.) (Ysgithrwyn Pen Beidd, Yskithyrwynn Pennbeidd; Middle yskithyrwyn penn beird, RBH; ẏskithẏr6ẏn WBR) or `White-tusk chief of Boars` is another boar being hunted, secondary to the great boar Twrch Trwyth by the Arthur`s wild chase party in the Welsh Arthurian rom......
Found on
http://en.wikipedia.org/wiki/Ysgithyrwyn
No exact match found.