I was very pleased to have actually found a photograph of a Beckerleg on a US passport application.. William Beckerleg Trethewey. It has a lot if information about him and his brother Richard gave information as well. William born New Jersey in 1873,was a son of Mary Beckerleg and William Henry Trethewey who emigrated to the US and lived in New Jersey.. It is the first time that I have seen a photo of a Beckerleg. His mother Mary was the daughter of William Beckerleg and Margaret James born Breage,Cornwall.