The legend persists, in many countries of southeast Asia, of intermarriage between a native princess (“lunar clan”) and an immigrant prince from India (“solar clan”). Such legends may indeed have some basis in fact: during the early centuries A.D., numerous Hindu elites and traders did indeed emigrate to SE Asia, where they intermarried with the local elites and blended their native culture with their newfound homes.
Source: Art-and-archaeology.com’s “Lunar and solar clans“
JAPANESE MYTHOLOGY & FOLKLORE 