My dad was raised with the last name of Kalas. When my dad was 2years old my grandmother remarried a George Kalas. He never adopted my dad but when my dad started school they just registered him as Kalas and he has been this his entire life. My dad is illegitimate as my gma was not married to John Guices which is the name on my dads birth certificate. I believe my dads father never knew my gma was pregnant. They had parted ways before she knew of her pregnancy and I don't know why this has been such a secret. My dads half brothers were born in 1932 and 1934. My g'mas first marriage was in 1930 to Edward Ryszkiewicz. I've yet to find a divorce record between the two nor have I found a marriage certificate for my g'mas second marriage.Thanks for your help!!