surrogate mother: a woman who bears a child for a couple where the wife is unable to do so
mother: a woman who has given birth to a child (also used as a term of address to your mother)
edda: either of two distinct works in Old Icelandic dating from the late 13th century and consisting of 34 mythological and heroic ballads composed between 800 and 1200; the primary source for Scandinavian mythology