May have a connection for you here. William Geen Trevessick was born in Barnstable, N. Devon in 1835, married Mary Jane Lewis, born Swansea 1839. Wm. and Mary Jane moved to Soho, London and by 1881 had Susanna b. 1860, Mary Ann b. 1864, Llewellyn born 1873, Louisa born 1871, Lewis Anthony born 1875 and Bessy born 1877.