Mary Wean was born in London.

Mary married Stephen Lavender on Tuesday 1 June 1745.

She had the following children from her marriage to Stephen Lavender:

- John Lavender	born around 1746.
- Sarah Lavender	born around 1748.
- Mary Lavender	born around 1750.
- Margaret Lavender	born around 1754.
- Stephen Lavender	born around 1757.
- Susannah Lavender	born around 1760.
- Edward Lavender	born around 1763.