I'm reading some books (in Arabic) about north African history, and exactly the Igilgili (modern day Jijel ) region and I found a story about a warrior / king who tried to conquer the region (4th century B.C) and take it from the Carthaginians. He settled there for a while then went back to Greece. A tribe of Greeks remained there under the name (CHITUÆ).
This king was mentioned to be Sicilian (and probably Greek), and his name (Transcribing exactly from the Arabic) : AGATHOFLIS/أغاثوفليس.
I couldn't find any resources in English about him, nor I could write his name correctly.
Any help would be appreciated.