I have found that my great grandfather and family moved to the Swansea area in the late 1800's.
John Yelland c1840 and Elizabeth Jane Tregenza
Georgeanna 1861, John 1863, Ann 1866, Eliza 1869, William 1871, Frederick b1873 and Joseph Edney 1880 (possibly Ann's son?)
They were all born in Truro area of Cornwall except Joseph ? Edney. I have my grandmother (Lilian 1906) but am trying to find her brother Wilfred John born c1908 and married c1937 - I can't find anything else on him or confirm any other siblings or any other relations.