Robert de Musters
Robert was born in 1105 in Kirklington, York, Eng.  He died at the age of 79 in 1184 in England.

 Geoffrey de Musters
Geoffrey was born in 1135 in Kirklington, York, Eng.  He died at the age of 93 in 1228 in England.

 John de Musters
John was born in 1141 in Bassingham, Lincoln, Eng.  John is no longer alive.