I've been able to trace Monty Roche. His full name is Robert Guillemont Roche, bn 14 Apr 1918 at Ballynamuddagh in the Dromin parish. I can't trace any marriage. The Roche family moved to Manchester in England around 1927 once Larry Roche had retired. Monty died in Jan 1979 in Manchester. I believe he served in the British RAF. Both his sisters also moved to England, Mary Bega Roche became a school teacher and died in 1977 (Manchester) and Margaret Frances Roche (Peg) died in Dec 1986 (place n/k).
Laurence Patrick Roche died tragically from a motorbike crash in Cork in 1929.