 Hennessy then went into partnership with his son, also named, John Francis Hennessy, as Hennessy & Hennessy from 1912 to 1923, when he retired.His son retained the name and went make the firm one of the most successful commercial practices in the 1930s in Australia and New Zealand.John Hennessy died only a year after retiring on November 1924 at his home in Belmore Street, Burwood.