Congrats on another baby girl! [name]One[/name] style of name that might fit, without ending in -n/son or -y/ee etc, are some of the -er names. Some of the best ones for a girl (and I know some on here will disagree, but such is taste), to my ear, are
[name]Taylor[/name] (I realize it might be a little passe, but I still think it has a nice sound).
Another option are surnames/surname-ish uni-ish with other endings:
Another option would be to go with a name ending with -a, more traditionally feminine, and to maybe stick with names that are more modern/recently popular in nature. There will be some imbalance with uni-ish [name]Addison[/name], but I think they still work especially if she goes by [name]Addie[/name] a lot. Some options might be:
[name]Michaela[/name] ([name]Makayla[/name] may look more modern - and I like it the best of the modern spellings, but as [name]Addison[/name] and [name]Jackson[/name] are spelled traditionally - not Addysyn and Jaxxen or something - I think [name]Michaela[/name] can work)
Another option are short and simple, feminine but not frilly, modern or uncommon old names that don’t end in -n:
[name]Jade[/name] (although you may prefer to avoid two J names?)
There are more in these categories - I am just blanking - but hopefully they will help you as you look or will help other posters think of replies.
Finally, I do think a lot of names ending in -n could work (but you should probably avoid -son), and names ending in -ee etc could work, it really depends on what exactly your last name is.
If I think of more I’ll post - do some of these suit you more than others?