is that pronounced kay-a or ky-a or some other way
simple middle names are May, Rose, Anne, Lynn, Marie, Jane and Louise
Kaia May sound sweet in a repetative way
Kaia Rose is sweet and feminine
Kaia Anne is ok but runs together a bit
Kaia Lynn is nice and sounds more modern if you like that
Kaia Marie is sweet
Kaia Jane is ok
Kaia louise doesnt flow as good to me
you could try others, these are some popular name round here that ive put as middle names:
Kaia Ruby
Kaia Isobel
Kaia Amelie
Kaia Lilian
Kaia Scarlet