The parents of William were John Trestrail & Elizabeth Hosking. They were married in Phillack on 3 March 1811. John was buried 6 Aug 1824 aged 40 whilst Elizabeth was buried 12 Aug 1850 age 58 ( both Phillack). Their children were:
John bapt 7 June 1811 Phillack
Richard bapt 13 Sept 1812 Phillack married Elizabeth Mia Struges Penrose 23 Nov 1835 Phillack
Elizabeth bapt 12 Mar 1815 Phillack
William bapt 8 March 1818 Phillack married Eliza Powning 1843
James bapt 7 May 1820 Phillack
Thomas bapt 9 March 1823 Phillack married Charlotte Curtis 27 Aug1846 Phillack
Albert was the son of Thomas & Charlotte.
Elizabeth Ann was in a Blind Institute in Plymouth in 1881 with 18 other boarders.
1881 RG11/2206 folio 73 page 8 ed 4 sch 42 56&57 St Aubyn St + 21&22 Market St
Elizabeth A, boarder, unm,31, chaircaner, Phillack, blind
Trestrail or Trestrayle as it was first spelt is also a place name near Probus. Early mention of the family in the C16 appear in Veryan, Creed & Kenwyn (neighbouring parishes) & then, in the C17, spread out a bit further. The Trestrails of Redruth can be placed into three families- the earliest in 1714.
Dave