ISO Male born in later half of 1962 or 1963 -West Allis, WI area

I am looking for a male adopted in 62 or 63. We are guessing sometime between Aug. 1962 through Aug. 1963 since the mother got pregnant quickly after baby #5. Unknown birth date as the birth parents would not share the info. Family lived in West Allis, WI. They were catholic and the mother may have given birth at a catholic facility/hospital or used catholic SS for adoption. The other children were born at West Allis hospital. The adopted boy was the youngest of 6. Reason he was given up is unknown. The siblings would love to meet him.