John Brennand was born around 1749 in Broadhead, Slaidburn, Yorkshire.

John married Millicent Parker in 1774 in Waddington, Yorkshire on 31st December 1774.

He had the following children from his marriage to Millicent Parker:

- Thomas Brennand	born in 1775 at Westmoorhead, Slaidburn, Yorkshire.
- John Brennand	born in 1777 at Greenwood, Slaidburn, Yorkshire.
- Thomas Brennand	born in 1779 at Stephenmoor, Slaidburn, Yorkshire.
- Margaret Brennand	born in 1782 at Champion, Slaidburn, Yorkshire.
- Millicent Brennand	born in 1787 at Champion, Slaidburn, Yorkshire.

Details of John's occupation are not known.

Details of John's death are not known.