Lazaro Y Gomez

My dad was born in the Philippines but he left for the states when he was a teen. He worked in New York most of his life, in Madison Square Garden Hotel in particular, I was told he used to be a bartender and at one point lived with a woman whom he had a chid with, I am not sure of the details since we rarely talked about his past lovelife. According to my parents, my dad went back to the Philippines for a vacation but he never left when he met my mom, they got married and stayed in the Philippines until their deaths. I am trying to find out if I really have a sibling back in the states...associated name could be Margaux and my dad's former partner is of a Russian or foreign etchnicity.