Thomas Ruby, Jr., is believed to be the elderly man living with John Ruby at the time of the 1830 census in Conquenessing Twp, Butler Co, PA. There is a male listed between the age of 90-100, which could put his birth year around 1745. This Thomas married in 1765, so the dates work out.

In 1777, Thomas Jr., signed as a resident of Baltimore County north 100. He lived in the Minr Run North 100 section of Baltimore County in the 1790 census.