Gloria Schenk as a child with my step grandma Margaret Harrnett Schenk

i am an adoptee looking for my siblings and close cousins
My Birth Mother was Gloria Mary schenk, who also went by Mohr, Sideratos, and alias names like Joane Reed. i am the baby of 11-18 kids 3 given away to some aunt named S. Schenk Atlanta GA one brother was a Michael born in 1957, she also gave a baby away to a bf's cousin in 1966 , rest of us were adopted. Ancestry names are Dwyer, Murray, Schenk, my sister I am trying to find was last named Mohr but she was adopted her name given was Margaret Mohr born in NY 11/15/1956