N'afọ 1918, Jinnah lụrụ nwunye ya nke abụọ bụ Rattanbai Petit ("Ruttie"), afọ iri abụọ na anọ na-eto eto. Ọ bụ nwa agbọghọ na-eto eto nke enyi ya bụ Sir Dinshaw Petit, ma bụrụ akụkụ nke ezinụlọ Parsi nke Bombay. E nwere nnukwu mmegide megide alụmdi na nwunye ahụ site n'aka ezinụlọ Rattanbai na ndị Parsi, yana ụfọdụ ndị isi okpukpe ndị Alakụba. Rattanbai jụrụ ezinụlọ ya ma gbanwee n'aha Islam, na-ewere (ọ bụ ezie na ọ naghị eji) aha Maryam Jinnah, na-eme ka ọ bụrụ onye na-adịgide adịgide site na ezinụlọ ya na Parsi Society. Di na nwunye ahụ biri na South Court Mansion na Bombay, ma na-agagharị na India na Europe.
Ezinụlọ Rattanbai