FN for Katherine

I want to honor my mom by using [name]Katherine[/name] as a middle name. She spelled it [name]Katherin[/name], but I think I would like to go with the more classic spelling. However, last name is To (rhymes with toe) and I think the -in spelling might look better than the -ine spelling. Still not sure how I want to spell it. Alternatively, she went by “[name]Kay[/name]” so I might consider that as a middle name too. Here’s what I’m considering so far. What do you think? Would love suggestions!

[name]Aria[/name] [name]Katherine[/name]
[name]Avery[/name] [name]Katherine[/name] (love but might be too popular)
[name]Freya[/name] [name]Katherine[/name]
[name]Gemma[/name] [name]Katherine[/name]
[name]Helena[/name] [name]Katherine[/name]
[name]Hera[/name] [name]Katherine[/name]
[name]Irina[/name] [name]Katherine[/name]
[name]Isadora[/name] [name]Katherine[/name]
[name]Isla[/name] [name]Katherine[/name]
[name]Ivanna[/name] [name]Katherine[/name]
[name]Layla[/name] [name]Katherine[/name] (again, probably too popular)
[name]Petra[/name] [name]Katherine[/name] ([name]LOVE[/name] [name]Petra[/name] but I don’t like the way it sounds with [name]Katherine[/name]… [name]Petra[/name] [name]Kay[/name]?)
[name]Philippa[/name] [name]Katherine[/name]
[name]Sybella[/name] [name]Katherine[/name]
[name]Willa[/name] [name]Katherine[/name]

Right now I’m loving [name]Gemma[/name], [name]Isla[/name] and [name]Philippa[/name] the most.