Hello Donald, No relation or connection. Found ref to the marriage of Joseph RITCHIE and Hannah Louisa STAFFORD in 1849. If you don't have marriage certcan send ref details + the PRO address.
Also, Hannah Louisa Child's 1st husband was a Robert Lawrence STAFFORD.They married in 1838. Saved ref etc.
Robert Lawrence Stafford died in 1842.
Hannah Louisa's sister Maria Child married William Sutterby in 1854. Maria was living with her widowed mother Elizabeth in the 1841 census. Maria is also mentioned in the 1861 census as Sister-in-Law to Joseph Ritchieas you know.