Euclid is known almost entirely through his mathematical works and a handful of later, largely legendary anecdotes; no ancient source states where he was born, and even his activity at Alexandria is inferred from the school he founded there rather than from a personal record.
What would resolve this A Hellenistic record naming his origin, which no papyrus or inscription recovered so far supplies.
OpenHistory of Hellenistic mathematics; classical scholarship; papyrologyDivinity Atlas Open Questions Register, First Edition