Charts where the earliest known Greathead ancestor was born in Somerset
- Chart 23: James Greethead
. James Greethead from Bristol is the first time I have found the dialect introduced. Members of this family may be recorded in either spelling and some later generations emigrated to Australia - Chart 30: John Greathead
. John Greethead born around 1781 in Bristol. He married Mary. They were the grandparents of James Frederick Greethead, otherwise known as Leotard Bosco