When Thomas Barnett was born in 1837, in Droitwich, Worcestershire, England, his father, Thomas Barnett, was 31 and his mother, Sarah Bourne, was 33. He had at least 1 son and 5 daughters with Sarah Turner. He lived in Marlborough in the Vines, Worcestershire, England, United Kingdom in 1851 and Wolverhampton, Staffordshire, England, United Kingdom for about 10 years.
English: habitational name from various places, for example Chipping (High) Barnet, East Barnet, and Friern Barnet in Greater London, named with Old English bærnet ‘place cleared by burning’ (a derivative of bærnan ‘to burn, to set light to’).
English (of Norman origin): from a medieval personal name, a variant of Bernard .
Jewish (Ashkenazic): this surname has been adopted by Ashkenazic Jews in the English-speaking world, perhaps as an Anglicized form of a vaguely similar Jewish name such as Baruch .