ลูกเธอ

Etymology
🇰🇲.

Noun

 * 1) (พระเจ้า~, สมเด็จพระเจ้า~) child of a monarch.
 * 2) (พระเจ้า~, สมเด็จพระเจ้า~) a formal title for or term of address to a child of a monarch.

Usage notes

 * The honorific prefix is specifically for a monarch's child whose mother possesses the royal rank of  or higher rank.
 * A male child is specifically called.