Complex sentence: His pedigree is unknown, and it is uncertain from where in England he came, but his wife was from the Parish of Nayland, in Suffolk, and their first three children were born there.
Split into simpler sentences: His pedigree is unknown, and it is uncertain from where in England he came. However, it has been found that his wife was from the Parish of Nayland, in Suffolk, and his first three children were born there.