William Thomas Moloney - adoption

Based on age of W T Moloney's parents it is likely that William Thomas Moloney was adopted and that Moloney is the adoptive family.. Additionally the autosomal DNA matches on Ancestry to his grand daughter suggest that William Tomas Moloney's parents/grandparents were Jewish of some percentage. Who were the biological parents of William Thomas Moloney. Self declaration on census 1890 US, 1910 Canada states birth place as Chicago Ill. Illinois adoption records are not public.