These are from a book of mine which lists the most popular names of the 1700s:
Girls: [name]Mary[/name], [name]Elizabeth[/name], [name]Ann[/name], [name]Sarah[/name], [name]Jane[/name], [name]Margaret[/name], [name]Susan[/name], [name]Martha[/name], [name]Hannah[/name], [name]Catherine[/name], [name]Alice[/name], [name]Frances[/name], [name]Eleanor[/name], [name]Dorothy[/name], [name]Isabel[/name], [name]Grace[/name], [name]Joan[/name], [name]Rachel[/name], [name]Agnes[/name], [name]Ellen[/name], [name]Maria[/name], [name]Lydia[/name], [name]Ruth[/name], [name]Deborah[/name], [name]Judith[/name], [name]Joanna[/name], [name]Marjorie[/name], [name]Jenny[/name], [name]Barbara[/name], [name]Bridget[/name], [name]Lucy[/name], [name]Eliza[/name], [name]Nancy[/name], [name]Emma[/name], [name]Charlotte[/name], [name]Dinah[/name], [name]Sally[/name], [name]Harriet[/name], [name]Caroline[/name]
Boys: [name]John[/name], [name]William[/name], [name]Thomas[/name], [name]Richard[/name], [name]James[/name], [name]Robert[/name], [name]Joseph[/name], [name]Edward[/name], [name]Henry[/name], [name]Samuel[/name], [name]Francis[/name], [name]Charles[/name], [name]Daniel[/name], [name]Benjamin[/name], [name]Edmund[/name], [name]Matthew[/name], [name]Peter[/name], [name]Nicholas[/name], [name]Christopher[/name], [name]Abraham[/name], [name]Jonathan[/name], [name]Philip[/name], [name]Michael[/name], [name]Hugh[/name], [name]Joshua[/name], [name]Anthony[/name], [name]Ralph[/name], [name]Andrew[/name], [name]David[/name], [name]Roger[/name], [name]Alexander[/name], [name]Laurence[/name], [name]Nathaniel[/name], [name]Walter[/name], [name]Timothy[/name], [name]Martin[/name], [name]Luke[/name]
As for the names you already have I think they’re generally fine, but [name]Rosemary[/name], [name]Chester[/name] and [name]Morgan[/name] seem to stand out. In all my years of doing family research, I’ve never really come across these names pre-1850s. That’s not to say they weren’t used, it’s just they weren’t very common at all. Also, [name]George[/name] [name]Chester[/name] looks like the odd one out because he doesn’t have a biblical name, yet his siblings do.
Good luck with your writing 