Mrs Alexandra Argenti was a member of the Greek community in London, probably related to the Ionides family.
The families were connected by marriage. For instance, Elfrida Mary (Alexander) Ionides (1898-1988), daughter of Lucas (Luke) Alexander Ionides (1837-1924), married Nicolas Argenti but divorced in 1933. Whistler had painted Portrait of Luke A. Ionides y032.
She owned Cremorne, No. 1 y163 in 1905.
Long, Christopher, Ionides.