Fionn Mac Cumhaill, a hero of Celtic Mythology, whose name is pronounced "Finn McCool."
Cu Chulainn is an Irish hero whose name means "the Hound of Culann." This name was given to him when he ripped apart the blacksmith's (Culann) guard dog with his bare hands as a young boy. As a punishment he offered to take its place until a successor could be reared.
Jacob, one of the Hebrew patriarchs, was renamedby God Himself as "Yisrael" (anglicized to Israel) meaning wrestles with God, after Jacob fought with an angel and won. The angel only defeated Jacob by wounding Jacobin the inner thigh. note He "pinched" the sciatic nerve, which in Hebrew is called the gid hanasheh, and which observant Jews do not eat to this day, in memory of Jacob's injury. Since the nerve must be extracted by hand, it's usually cheaper to just sell the hindquarters of a slaughtered kosher animal to a non-kosher (often halal) butcher, so Hebrew National advertises how it has no "butts" in its hot dogs, and it's nigh-impossible to find kosher filet mignon outside of Israel. The rule applies to hoofed mammals only; poultry are exempt.