Rear-Admiral William Le Poer Trench (4 July, 1771 – 14 August, 1846) was born in Garbally, Galway, Ireland to William Power Keating Trench, 1st Earl of Clancarty and Anne Gardiner. He was married twice first on 8 March, 1800 to Sarah Cuppage, daugher of John Loftus Cuppage. Sarah died in June of 1834 and on 1 February, 1837 William married a second time to Margaret Downing, daughter of Dawson Downing and Anne Boyd.

References

• thepeerage Accessed October 10, 2008
• Urban, Sylvanus. "Rear Adm. Hon. W. L. Trench." The Gentleman's Magazine Obituary, Vol. XXVI, Series 181, Joh Bowers Nichols and Sons, 1846. (p. 646) googlebooks Retrieved October 10, 2008