On 27 May 1731 Sylvanus first married Elizabeth Hart in Farmington, CT. Born ca 1705 in Farmington, CT. Elizabeth died in Farmington, CT on 24 Oct 1765.

Elizabeth, dau. of Thomas & Elizabeth (Judd) Hart.

On 18 Feb 1767 Sylvanus second married Justina Parker (26333) , daughter of Sergt. Eliphalet Parker (10390) (ca 1687-1758) & Hannah Beach (22282) (17 Mar 1683/4-21 Dec 1749).55 Born on 18 Apr 1714 in Wallingford, CT.90 Justina died in Simsbury, CT, on 15 Feb 1777; she was 62.55

Justina, also called Chestina, Parker. Peter and Justina had eleven children including:
    i. Israel, bp. Aug 1734 in Cheshire; and
    ii. Eliphalet, bp Feb 1735 in Cheshire.55