Khmaladze is a Georgian surname.

Khmala = gladiolus, khmali = sword (both meanings are, certainly, connected), dze = son.

So, it could be translated, in principle, as Swordson.

The surname appeared in Georgian chronicles as old as 14th century;

it is shown on the list of Georgian chevalry in Georgian-Russian treaty (Georgievski Tractat) of 1789.

In pronunciation, Kh = Ch in words like Chronicle, Chemistry, Chronology, etc.