Complex sentence: Wadham was probably born at Merrifield, near Ilton, Somerset, the only son of John Wadham (d.1578) of Merrifield and of Edge, Branscombe, Devon, by his wife wife Joan Tregarthin, daughter of John Tregarthin and widow of John Kellaway.
Split into simpler sentences: Wadham was probably born at Merrifield, near Ilton, Somerset. He was the only son of John Wadham and his wife, Joan, daughter of John Tregarthin and widow of John Kellaway.