Hi, Wendy,
Yes they all survived, so CWGC not a help. I did check out Newton numbers on the online Medal Rolls but couldn't see any correlation between any two names.
There were seven brothers, sons of John Newton, a tea dealer who ran a shop in Brinksway, Cheadle, Stockport, general dealer and post office.
From 1891 and 1901 census:
Frank A b app 1885,
James J b app 1887,
John William b. app 1881,
Arthur b. app 1891
Samuel H b. app 1892
Frederick b. app 1895
Walter S b. app 1896
and Arthur and Samuel were two of the four who joined up
Nic