Pat, for example, appears on both, that and Theo and are short versions of male and female names, rather than being names that have swung from female to male.
Jan and Jean could both be caused by migration, as they are both very long-standing male names in some countries and female names in others.
Toby is a very long-standing male name (Sir Toby Belch, not Dame Toby Belch).
Very few of the names on the female-male list have the same kind of significant swing present on the male-female list. None of them are like Allison, Beverly and Lauren.
Pat, for example, appears on both, that and Theo and are short versions of male and female names, rather than being names that have swung from female to male.
Jan and Jean could both be caused by migration, as they are both very long-standing male names in some countries and female names in others.
Toby is a very long-standing male name (Sir Toby Belch, not Dame Toby Belch).
Very few of the names on the female-male list have the same kind of significant swing present on the male-female list. None of them are like Allison, Beverly and Lauren.