Ordinary Seaman Emmanuel Valenca (or Valencia) was an English sailor of the Royal Navy who died during the First World War.
He was born in 1898, in Mile End, the son of Emmanuel, a cigar maker, and Emily Miriam Valenca (née Blood), both of London. At the time of the 1911 Census, the Valenca family were residing at 3 Adelina Grove.
He has no known grave and is commemorated by the Chatham Naval Memorial.
- Valenca, Emmanuel, cwgc.org. Retrieved 2 August 2013.