Details of John's birth are not known.

John married Frances Ann Lavender in 1833 in All Saints Church, Evesham, Worcestershire.

He had the following children from his marriage to Frances Ann Lavender:

- Frances Catherine Farrell	born around 1835 in Brentford.
- John Douglas Farrell	born around 1836 in Brentford.
- William Lavender Farrell	born around 1840 in Brentford.

John was a Surgeon.