- May 3 Earl Blackwell, American society impresario (Celebrity Register), born in Atlanta, Georgia (d. 1995)
- May 3 William M. Inge, American playwright (Picnic-Pulitzer 1953), born in Independence, Kansas (d. 1973)
- May 4 Lady Katherine Brandram, Princess of Greece, the last surviving great-granddaughter of Queen Victoria, born in Athens, Greece (d. 2007)
- May 6 Jack [John T] Aitken, British anatomist (d. 1992)
- May 6 Kenneth Horne, English paper manufacturer/multi-millionaire
- May 6 Ronald Harris, British 1st Church Estates Commissioner, born in Cornwall Gardens, Kensington, London (d. 1995)
- May 9 John Hayes, British Naval Officer and Naval Secretary, born in Southcote, Bermuda (d. 1998)
- May 9 Victor Smith, Admiral (Australian Chiefs of Staff)
- May 11 Robert Jungk, Austrian publicist (d. 1994)
- May 13 William R Tolbert, president Liberia (1971-80)
- May 17 Alec Ogilvie, CEO (Powell Duffryn)
- May 17 Desmond Barel Hirshfield, Lord Hirshfield, British chartered accountant, born in Birmingham (d. 1993)
- May 19 Sanjiva Reddy, Indian politician, sixth President of India (1977-82), born in Illur, British India (d. 1996)
- May 19 Bert Hardy, English photographer (Picture Post), born in London (d. 1995)
- May 20 Henry Cadbury Brown, architect
Bill Hewlett
May 20 William Hewlett, American engineer and businessman (co-founder Hewlett-Packard), born in Ann Arbor, Michigan (d. 2001)
Bill Hewlett
- May 23 Ian Graeme, major-general
- May 25 J. Peter Grace, American businessman and industrialist, born in Manhasset, New York (d. 1995)
- May 26 Fred Bertrand, Belgian politician, born in Bilzen, Belgium (d. 1986)
- May 27 Arthur Mervyn Stockwood, Anglican bishop (Southwark England), born in Bridgend, Glamorgan, Wales (d. 1995)
- May 27 Wols [Alfred Otto Wolfgang Schulze], German cartoonist and painter, born in Berlin (d. 1951)
- May 28 Gordon Wolstenholme, British physician (Ciba Foundation), born in Sheffield, England (d. 2004)
- May 29 Douglas Black, Scottish physician and medical scientist (played a key role in the development of the National Health Service), born in Delting, Shetland (d. 2002)
- May 31 Peter Gibson, British Rear-Admiral
About May 1913
How Old? 107 years old
Generation: Greatest Generation
Leap Year: No