- Cummins family
- 5 people
- United States (Clintwood)
The only verified example of a family producing five single children with coincident birthdays is that of Catherine (1952), Carol (1953), Charles (1956), Claudia (1961) and Cecilia (1966), born to Carolyn and Ralph Cummins (USA) all on 20 February.
The random odds against five single siblings sharing a birthdate are one in 17,797,577,730 - almost 4 times the world's population.