I often take a circuitous path, spiraling backwards as I gather information that will hopefully help achieve the end goal. Here's my path:
Here's a marriage record for Ward J. Spencer to Ruth B. Lewis on 24 Oct 1913 in Cuyahoga County, Ohio. Ward lists his birthplace as Youngstown, Ohio, and his parents as Thomas (Spencer, deceased) and Sarah Davis.
In this death certificate, Sue (Spencer) Eisenmann, born 1890 in Youngstown, also lists Thomas Spencer and Sarah Davis as her parents. She (or really, her informant, possibly a daughter?) also lists their birthplaces: Thomas (London, England) and Sarah (Niles, Ohio). This seems to be Sue's birth record.
Here is Thomas with wife and daughter Minnie in the 1880 Census. He's a plumber in Youngstown, Ohio, born in England about 1841.
Thomas' widow Sarah Ann "Sadie" (Davis) Spencer dies 26 Jul 1939. Her death certificate leads me to her obituary in the Cleveland Public Library's Necrology File, which has this entry: "Spencer: Sarah Ann (nee Davis), widow of Thomas and mother of Minnie D. Spencer of New York City, Sue M. Eisenmann and Ward J. Spencer of Cleveland, and grandmother of Louis, Richard and John Spencer, passed away July 26, 1939. Private funeral services at the late residence, 3293 Clarendon rd., Friday, July 28 at 1 p. m. Burial at Niles, O.
Sarah/Sadie is also listed as widowed at the time of the 1910 US Census.
No real sign of Thomas outside of his entry in the 1880 Census. Latest mention that I can find of him (so far) is his entry as father in Susannah's birth certificate on 4 Oct 1889 in Youngstown. It's a bit of a dead end, for now.