1861 census has a Fanny B Gill a few months old, daughter of Rebecca Gill. There are lots of other children and a lodger called Thomas Bunt. I did see some St Teath baptisms for some children with Bunt as middle name, so it looks as though he was recognised as the father of some of them.
The census says she is unmaried, but when Rebecca and Thomas married later in 1861 she was a widow, her father had different surname so likely to be right.
Rebecca could be widow of a sibling of one of the people we're looking at. Her maiden name was Chilcott.