TRETHOUAN OF OTTERHAM
The will of Thomazin Moyse of Otterham, dated 19 October 1734, mentions her husband John Moyse, her sisters Elener Trethouan and Rebeckah Trethouan and her father William Trethouan. The witnesses were Edmund Turner and Thomazin Trethouan.
William Trethouan of Otterham was probably closely related to Jane Trethouan who married John Rowse at Treneglos in 1699/1700. The will of John “Roose” of Warbstow was witnessed by William Trethouan in 1721.
There was a William Trethowan baptised at Mylor in 1678, son of John and Eleanor, who could be the William who married Thomasine Turner. The other children of John and Eleanor included a Jane, baptised in 1667.
Thomasine (Turner) Trethouan may be the Thomasine Turner baptised at Poundstock in 1679, daughter of Richard and Mary. There was also a Thomasine Turner baptised at St Gennys in 1687, daughter of Thomas, but that would be rather late for an individual married in 1702/03.
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Children of William and Thomasine (Turner) Trethouan:
 Will dated 16 Aug 1771, proved 13 Dec 1771 (Kresen Kernow, AP/H/6437); Warbstow parish registers. The burial entry gives the name as “Thomasin Holman”, but no Thomasine Holman to whom the entry would be likely to relate has been found. As Rebecca (Trethouan) Holman, who lived at Warbstow, is known from her probate documents to have died between Aug and Dec 1771, and no burial record has been located for her elsewhere, it appears that the name Thomasin in the register is an error for Rebecca.