The Galton name is an interesting one in that it was, in the past, very local to around the south east corner of Dorset. There is a very small hamlet of that name just to the east of Owermoigne on the A352 to Dorchester and this may be associated with the name origins.
There are variation spellings of Galton such as Golton & Gaulton in the older records to add to the uncertainty while researching.
The first person we know of with some cetainty is Thomas Galton who might have come from Sturminster Marshall, born in 1774. He married Susannah Pelley Anstey in the Parish Church of St James in the old centre of Poole on 5th April 1802, where many family members were baptised and married. Susannah was baptised there on 23 June 1780. The Anstey name is the subject of a One-Name study by Gary M Anstey who believes that the name originated only once from a person who was gifted the Manor and Castle of Anstey, Hertfordshre by King Stephen during the King's troubles with rebelllious family members in 1143. The research continues and another book is awaited!
revised 21 June 2021