My father gave me a birth certificate of someone whom he thought was his mother but the name did not correspond with what he thought was her name. The name on the birth certificate says "Bozena" Nemecek althought he thought her first name was Helen. On reading the birth certificate further the mothers name was also listed as "Bozena". Is this a first name or indication of female sex? The family was said to have been on Czechoslovakian ancestry.