The title is probably confusing, so I’m going to explain.
Some names often have nicknames. For example, people named [name_f]Abigail[/name_f] often go by [name_u]Abby[/name_u]. People named [name_m]Christopher[/name_m] often go by [name_u]Chris[/name_u].
There are also names that often don’t have nicknames. For example, most people named [name_f]Sarah[/name_f] go by [name_f]Sarah[/name_f]. People named [name_m]Sean[/name_m] often go by [name_m]Sean[/name_m].
Then there are names that go either way. Someone named [name_f]Caitlin[/name_f] might go by [name_f]Caitlin[/name_f]. She may also prefer a different name, such as [name_f]Katie[/name_f] or [name_f]Kate[/name_f]. Someone named [name_u]Michael[/name_u] may go by [name_u]Michael[/name_u] or [name_m]Mike[/name_m].
So I guess what I’m asking is if you can come up with as many names in the categories as possible: names with nicknames (for example [name_f]Abigail[/name_f] “[name_u]Abby[/name_u]”, [name_m]Christopher[/name_m] “[name_u]Chris[/name_u]”), names without nicknames, (for example [name_f]Sarah[/name_f] and [name_m]Sean[/name_m]), and names that go either way (so [name_f]Caitlin[/name_f] and [name_u]Michael[/name_u]).