I presume you think this is the John who was born c 1720?
Baptisms;
St Peter and St Paul, Wantage
IHONE Kepe (F), 6 Jan 1541, Twin JANE same day
WILLIAM Keepe, 20 March 1543
ALICE Keepe, 31 May 1548
ANNIS Keepe, 16 Sept 1550
Parents IOHN and ALICE, yes spelt Iohn
* Plus a possible PETER Keepe 1558, Father only Iohn
(FreeREG)