John Masterson
John was born in 1585 in Rosmenock, England.

 Unknown ?
Unknown is no longer alive.

 Laurence Masterson
Laurence was born in 1611.  He died at the age of 23 on September 21st, 1634 in London, England.  He was buried in St. Clements Danes.

 Thomas Masterson
He died in 1642.