Betty Clarissa Cartwright was born on Tuesday 27 January 1925.

Betty married John Alan Lavender on Thursday 5 August 1948.

She had the following children from her marriage to John Alan Lavender:

- Jane Elizabeth Lavender	born in 1950 (date suppressed).
- John Anthony William Lavender	born in 1953 (date suppressed).
- Rosemary Ann Lavender	born in 1955 (date suppressed).