Abdi in the Bible Encyclopedia - ISBE

ab'-di (`abhdi, probably by abbreviation "servant of Yahweh"): (1) A Levite, father of Kishi and grandfather of King David's singer Ethan (1 Ch 6:44; compare 15:17). This makes Abdi a contemporary of Saul the king. (2) A Levite, father of the Kish who was in service at the beginning of the reign of Hezekiah (2 Ch 29:12). Some mistakenly identify this Abdi with the former. (3) A man who in Ezra's time had married a foreign wife (Ezr 10:26). Not a Levite, but "of the sons of Elam."

Link: https://bible-history.com/isbe/A/ABDI/