Ebina Hina is prob the wrost imo
Hayama Hayato.
I don't think it will ever be explained, they are afterall, just names. Ask their parents
.
I am more curious why Haruno is Haruno and not Yukino.
It makes a little more sense to name your 1st child Yukinoshita Yukino, then your second Haruno.
(ofc, the name Haruno (using the character for sun instead of snow) wouldn't match her personality)