Moore (d. 1849) of Buncrana Castle in Inishowen, Ireland (third son of William Thornton-Todd, heir of both Isaac Todd, the prominent Montreal merchant with the North West Company, and William Thornton, a British Army officer who served as Lieutenant Governor of Jersey)[2] and his maternal great-grandfather was Joseph Morse (30 Nov 1721 Medfield MA-1769 Amherst, Nova Scotia), a pre-Loyalist planter to Nova Scotia.

[3] In 1878, Williams-Taylor joined the Bank of Montreal and by 1897, he was appointed Assistant Inspector, Head Office.

[4] In athletics, he "earned great distinction in skating, rowing, tennis, squash, racquets, and stroked the Wanderers four-oared crew" in Halifax, in 1886.

Together, they had a daughter: Just before her daughter's wedding in Montreal in December 1917, Lady Williams-Taylor was painted by the Swiss-born American society artist Adolfo Muller-Ury at his palatial home, Star Acres, in Nassau in the Bahamas,[3] after which he attended the wedding ceremony.

[10] While living in the Bahamas, Sir Frederick and Lady Williams-Taylor were close friends of the Duke (formerly Edward VIII) and Duchess of Windsor.