"Blend of Ida and Mae"
The name Idamae is commonly a female name from the "English" origin.
Idamae is a compound given name made from two established girls' names, Ida and Mae, joined without any change of spelling. Both elements were in ordinary use in the United States at the time the name first appears in birth records, in 1901, which fits the period's pattern of double names for girls. The name carries no separate meaning of its own beyond the two names it combines.
The pronunciation of Idamae is EYE-duh-may.