There'll always be a William.
But girl's names have not stood the test of time so well, Bupa said.
Researchers compared the names of residents in its 298 care homes with those of children at its nurseries.
It found that three of the most popular men's names, William, James and Thomas, also appeared on the boys' list.
However, none of the women's names made it on to the girls' list.
The most common care home names were John and Mary, while the most common nursery names were Sam and Isabel.
The men's list featured George, Robert and Edward, while the boys' list featured Ben, Alexander and Oliver.
The women's list featured Mary, Margaret and Joan, while the girls' list featured the names Isabel, Sophie and Molly.
Dean Cowley, marketing director of BUPA Care Services said: "There seems to be a timelessness with boy's names.
"With girls, however, there is a pressure on parents to come up with something a little more exciting. Mind you, we are still a long way from names like Apple, Suri and Fifi Trixibelle hitting our top 10 list."