Posthumus was born in 1754, the son of John Jr Bowie and Elizabeth Pottinger. The place is not known.
He has died but the date and place are unknown.
Posthumus Child Bowie (1754-?)
John Jr Bowie (1708-1753)
John Sr Bowie (c1688-1759)
Mary Mulikin (-1750)
Elizabeth Pottinger (1717-1755)
Robert Pottinger (c1700-?)
Anne Evans (c1700-?)