Laurie E. Pearce and Cornelia Wunsch discuss the name Aḫā as a name among Judean exiles in Babylonia; cognate to Hebrew ‘ḥ ("brother").
Laurie E. Pearce and Cornelia Wunsch, Documents of Judean Exiles and West Semites in Babylonia in the Collection of David Sofer (Cornell University Studies in Assyriology and Sumerology 28; Bethesda, Md: CDL Press, 2014), 35
Aḫā (ma-ḫa-‘, no. 95:10; BaAr6 35:11)
hypocoristic based on ‘ḥ (or aḫu), “brother”; West Semitic or Akkadian; PNA 1/I 56