My gg grandfather William Symes was born in London in 1827. He had a brother Charles Symes. Their father's name was Robert Symes, who was born in Broadclyst in Devon, and later moved to London. Many members of the family were eating house keepers or inn keepers. William married Martha Calcoon and had nine children baptised in the Church of St. Clement Danes, Strand, London. Because of the name similarities in your Symes family information, I wonder if there is any connection?