Frank married Kathryn Bayard Montgomery on 6 Apr 1923 in New York City, , New York, Grace Church. Kathryn (daughter of James Mortimer Montgomery and Cornelia Marshall Peabody) was born on 8 Apr 1894 in New York, New York, USA; died on 24 Aug 1954 in , North Hatley, Quebec, Canada; was buried in Brooklyn, Kings, New York, USA. [Group Sheet] [Family Chart]

1. Cornelia Montgomery Ransom was born on 29 Jun 1929 in New York City, , New York; was christened in New York City, , New York; died on 27 Nov 2012 in Augusta, Richmond, Georgia, USA.
2. Kathryn Bayard Ransom was born on 5 Aug 1932 in New York City, , New York; died on 26 Nov 1967 in Dorset, , Vermont; was buried in Brooklyn, Kings, New York, USA.