Timothy Spencer was born on March 11, 1704/05  in East Haddam, Middlesex County, Connecticut and his parents were Abigail and Timothy Spencer (Sr.).
He was mentioned in his father's last Will dated 27 Mar 1732 ...
"I give to my son Timothy Spencer, all my home lott and the house and the barn and the lott the barn stands upon, and the lott joining to Capt. Brainard's wood lott, and the 2 acres of mowing land in my own meadow, when his mother hath done with it; and also, to be at his own use forthwith, all my land in the home meadow and 7 acres of land lying on the heather end of the Streights, and 10 acres of land lying below the Streights (partly imporved), and a third part of all my right of undivided land, and no more of my estate." 
Timothy Spencer (Jr.) married about 1734 in Haddam, Middlesex County, Connecticut to Elizabeth Cowles. However reports indicate that couple had no children, so cannot be the Timothy Spencer of this profile 
He died on 21 Sep 1789 in Manchester, Hartford County, Connecticut, USA.  In his TAG article, Jacobus, suggests this profile's Timothy Spencer died in Vermont. 
Timothy Spencer, b: 1734; d: 18 Oct 1779 Springfield, Windsor Co, VT; m: c1756 Lois Hill
Dates for the wives of the Timothy Spencer profiles are quite different so possibly there were two couples with the same names in Connecticut.
According to Jacobus, the couple Timothy Spencer that had no children lived in the Hartford area, so maybe the one that lived in the Haddam area is the one that had children. 
Linked Find A Grave: Memorial #6905494 is for Timothy, whose parents are Thomas and Sarah Meakins, which is the 'other' Timothy Spencer profile. The child linked to that profile is probably incorrect, if that is the correct Timothy and linked parents
The linked Death source has no spouse or parents listed, but location is probably the 'other' Timothy Spencer because it is closer to the Hartford area, than the Haddam area, of Connecticut.
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It may be possible to confirm family relationships with Timothy by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: