. >> reporter: davina schuman, a relative i never met, graciously gave me this glimpse -- >> be my guestter: -- of the family i never knew i had. the levys were a conservative jewish family from cleveland. their patriarch harry levy the bald guy there is my great grandfather. and in the spring of 1930 one of his four daughters, we don't know which, gave birth out of wedlock to my mother. davina, one of harry's baby.imate >>ld be scandalous. really in those days. for this family. >> reporter: my mom died knowing none of this. she was raised by another couple. no formal adoption. no paper trail. so if not for dna testing my ancestry would have remained a secret. a recent survey showed about a quarter of the people who take these tests find some kind of surprising result. or inurgthas mor definitive reg grandfather, an irish catholic railroad worker named frank black. >> i'm steve. >> reporter: this is his other daughter, carol. my new aunt. i see a little bit of my mother in you, actually. >> you do? >> yeah. >> reporter: and my new brother also named frank black. together they told me all