When researching the paternal side of my family, I was intrigued by my great-grandfather, Frank Healy. He was born to Irish Catholic immigrants who settled in Hudson, Columbia County, New York, and the St. Mary’s baptismal record in Hudson identified his birth date as 14 June 1864. This warmed my heart, because I was born 100 years to the month after him. Somehow knowing this made me feel a bit closer to the man my father was named after, but whom neither of us had ever met.
The statistical probability of sharing a birthdate with anyone, even one’s own child, is 1 in 365. These are not bad odds, and certainly significantly better odds than holding a winning Powerball ticket. But what is the likelihood of multiple generations of parents and children, on both the maternal and paternal side, having shared birthdays? Continue reading Shared birthdays