Two names one letter apart stand in the passion narratives and the church has never quite decided whether they are one man. Clopas appears once, and only in a genitive: standing by the cross was 'Mary the wife of Clopas' (John 19:25). Cleopas appears once, walking to Emmaus, and is named while his companion is not (Luke 24:18). Clopas is a Semitic name and Cleopas a Greek one, a shortening of Cleopatros, so they are not variants of one another — though one man could carry both, as Simon carried Peter. What raises the stakes is Hegesippus, writing around 180 and preserved by Eusebius: he says Clopas was the brother of Joseph, and that his son Symeon was appointed second bishop of Jerusalem after James was killed, being a cousin of the Lord. If that is right, the Jerusalem succession passes twice through one family — to a brother of Jesus, and then to a cousin. This dataset keeps Clopas and Cleopas as two persons, because the sources give two names and merging them would assert what nobody can show. Hegesippus' kinship claim is recorded here and on Simeon's page, and deliberately not turned into a relationship row, because bonds come only from Wikidata and cannot be authored.
Ecclesiastical History · HE 3.11 and 4.22