Name riddle! Can you guess it?

Hello all,
I have posted this before, but I’m doing it again!

A fellow mum in my mothers group is expecting her 4th child, her children all have a pattern in their names, its not overly obvious but ill explain it, anyway they are sticking to the pattern for their fourth but they aren’t finding out the gender this time and they also aren’t sharing their names as their 3rd child, who has an extremely unique name, they told people and those people blabbed and eventually someone else used the name, before their baby was born, though they still chose to use it.

They have
[name]Cassius[/name] (b)
[name]Tennyson[/name] (b)
Prisseis (g) (pronounced pris-ay-is)

Their pattern is repeating of sounds in their names.
caSSiuS
teNNysoN
priSSeiS

All names are three syllables, and the first syllable ending is also the third syllable sound.

So based on this information can you figure out what names they are considering, boy and girl options!

my money is still on [name]Forrester[/name].

Also:

[name]Dennison[/name]
Nelliel
[name]Anniston[/name]
[name]Cinnamon[/name]
[name]Finnegan[/name]
[name]Innogen[/name]
Kennison
Pennington
Pennilyn
[name]Coolio[/name]
[name]Farrier[/name]
Spurrier
Vassilis
Azzrinaz

less perfect:

[name]Habakkuk[/name]
Ailill
[name]Rhiannon[/name]
[name]Odysseus[/name]
[name]Ulysses[/name]

Are you talking about [name]Cory[/name] [name]Jane[/name]'s children?

Those are pretty shi**y medical problems for a family to be dealing with. [name]One[/name] kid with tuberous sclerosis and the other with a partial pneumonectomy for what might be alveolar sequestration. Jeez. And another baby on the way?

I am going to guess [name]Jennison[/name]. Very strong or pretty name!