My oldest brother was married very young, at 18. He and his wife had a daughter, "Leslie", who would only be a year or so younger than I am (my brothers were all quite a few years older than I am). They split up when Leslie was about 4 or 5, and I believe the mother remarried and her new husband adopted Leslie. I never saw her again; my brother apparently never did either. Many years later, another brother asked where Leslie was, and OB replied he didn't know. How you can't know where your child was for years and years, none of us could understand, but it wasn't our business. He might have signed away his parental rights, I don't know. OB passed away in 2006.
Every now and then, I get the idea of finding "Leslie", like on the Maury show with those family reunions. With sites like Ancestry, it's tempting. Still, probably a bad idea, even if I could do it-right?
Has anyone else ever found a "lost" family member?