Girl middle name containing "Kai".

We have chosen a unique, unisex first name for our baby (if it's a girl). First name starts with D and ends with N, comparable to Dylan. We want a feminine middle name, can also be unique, that contains "Kai". We like the meaning (ocean). Any suggestions for a middle name are welcome. Also welcome, if you'd like to throw out another name with a "beachy" meaning or feel to it. Thanks yall!