imbabaleyon (der. of imbabale) nom. 1refers to the child of a sibling; nephew or niece. Hi Juan ya imbabaleyon Pedro. Juan is the nephew of Pedro. ‑on. (sem. domains: 22.214.171.124 - Related by birth.) 2refers to one who becomes a son or daughter through the marriage of one’s child; son-in-law or daughter-in-law.