Hi,
The only likely William May I have found was bapt. 3-9-1780 Brimpton St.Peter s/o Thomas & May
As posted by Mckha489; 
Brimpton St.Peter;
William May, bac, otp - m - Sarah Milleson,  sp, otp (signs Millison) 
wits; William Millison, James Cripps
By Banns (24-11, 1 & 8-12)
Possible burial;
12-2-1855 Sarah May (77) Newbury St.Nicholas
Alan