Help with a middle for Kai, earthy theme

We live near the water and I would like a middle that sticks with an ocean/water theme or nature…earthy. Our last name is two syllables.

I think a 3+ syllable middle would flow best with 1 syllable 1st and 2 syllable last name. [name_f]Do[/name_f] you like any of these?
[name_u]Kai[/name_u] Aberforth
[name_u]Kai[/name_u] [name_m]Adrian[/name_m]
[name_u]Kai[/name_u] [name_m]Albion[/name_m]
[name_u]Kai[/name_u] [name_m]Caspian[/name_m]
[name_u]Kai[/name_u] [name_u]Meredith[/name_u]
[name_u]Kai[/name_u] [name_u]Everest[/name_u]
[name_u]Kai[/name_u] [name_u]Florian[/name_u]
[name_u]Kai[/name_u] [name_u]Juniper[/name_u]

There are plenty of 2 syllable ones:
[name_u]Kai[/name_u] [name_u]Linden[/name_u]
[name_u]Kai[/name_u] [name_u]Ocean[/name_u]
[name_u]Kai[/name_u] [name_u]Oakley[/name_u]
[name_u]Kai[/name_u] [name_m]Adam[/name_m]
[name_u]Kai[/name_u] [name_u]Douglas[/name_u]
[name_u]Kai[/name_u] [name_m]Dover[/name_m]
[name_u]Kai[/name_u] [name_m]Arthur[/name_m]
[name_f]Kia[/name_f] Carrick

As [name_u]Kai[/name_u] means sea already, have you considered using a name that describes it?
[name_u]Kai[/name_u] [name_m]Llewellyn[/name_m]
[name_u]Kai[/name_u] [name_u]Cerulean[/name_u]
[name_u]Kai[/name_u] [name_m]Robert[/name_m]

I love the idea of describing it. [name_u]Kai[/name_u] [name_u]Cerulean[/name_u] paints such a beautiful picture. [name_m]Will[/name_m] have to look up more blue words.

I also love [name_f]Kia[/name_f] [name_u]Oakley[/name_u]. My grandma who passed before she had a chance to meet any great grandchildren had beautiful oaks on her property. She had robes hanging from some of the branches and we enjoyed swinging on them. We spent so many hours blowing bubbles with grandma under the trees. I could go on and on. As I type I realize this is the one. The 1,2,2 pattern is not the best, but the memories mean more. [name_u]Kai[/name_u] [name_u]Oakley[/name_u] mixes old memories and new memories we are creating where we live now.

Thank you so much.

[name_f]Glad[/name_f] to help! I liked the blue idea too but did struggle to find others… I’ll keep looking and let you know if i find anything else. [name_u]Oakley[/name_u] has such meaning for you that I would disregard the flow thing! All the best x

Thank you.

OK I’ve come up with these blue words that could work as middle names. Any of these work for you?
[name_u]Kai[/name_u] [name_f]Azure[/name_f]
[name_u]Kai[/name_u] Zaffre
[name_u]Kai[/name_u] [name_f]Indigo[/name_f]

[name_f]Azure[/name_f] I have considered for a girls first name, still considering, so it seems more feminine to me. I do like [name_u]Kai[/name_u] [name_f]Indigo[/name_f].

Thank you.