This WOp/AG was lost over Germany on 30 January 1944 with 514 Squadron. Does anyone know where he was from and his age?

Another Robert Montgomery (PO RAFVR 170961) from Coventry was lost over France with 49 Squadron on 27 April 1944 aged 22.

A Robert Montgomery, signed professional by Leeds United FC, was killed serving with Bomber Command in 1944 but I cannot identify which of these two airmen is the correct individual.

Is there anyone out there who can offer me a clue?