William Mellish (c. 1763–1834) was an English businessman who was involved in supplying the Royal Navy, particularly during the American War of Independence.

Their father, Peter Mellish, Sr., had been a butcher in Shadwell, and they bid to supply the Navy with beef under a competitive tendering procedure.

[4] The same year Margaret paid for a family vault for her father in Highgate Cemetery.

[citation needed] In 1847, Elizabeth unsuccessfully attempted to gain a greater share of their father's estate with a court case.

[5] The trustees of the estate also felt concern over the profligacy of Lord Glengall, an Anglo-Irish nobleman, who went bankrupt in 1849 during the Great Famine in Ireland, a status he retained until his death in 1858.