The Oxfordshire Family History Society has produced a CD of monumental inscriptions in the church and churchyard, which can be obtained from here: http://www.ofhs.org.uk/CDsales.html#mis
The index of names on the CD is here: Index of Monumental Inscriptions
The data is copyright OFHS and reproduced here with permission.
First World War – the list of those who fell in the Great War is here
Second World War – the East Window, which was designed by Sir Ninian Comper, was dedicated in 1951 as a memorial to those who fell in the Second World War – listed here