Links to songs on Mainly Norfolk with July in the lyrics:

The Butcher Boy / Hanged Shall I Be (Roud 263; Laws P35; G/D 2:200)
The Cruise of the Sun Glory [Gerald Short]
The Cuckoo (Roud 413; G/D 6:1157; Henry H479)
Farewell to the Gold [Paul Metsers]
The Fourteenth of July / The Little Fighting Chance (Roud 980; Laws J19; G/D 1:42)
Gone to America [Steeleye Span]
Henry the Poacher / Van Diemen's Land (Roud 221)
I'Anson's Racehorse / Little Dun Mare (Roud 176)
Living by the Water [Anne Briggs]
Lord Willoughby (Roud V18836)
May Song—Bedfordshire (Roud 305)
The Months Go Round [Steve Ashley]
The Mower (Roud 833)
Old Kimball / Skewball (Roud 456; Laws Q22)
The Rigs of Rye (Roud 985; Laws O11; G/D 5:1054)
Two Young Brethren (Roud 202)