Probably from the same as poth; expansive; Pithon, an Israelite -- Pithon.
see HEBREW poth
H6377. Pithon
מִּיתוֺן proper name, masculine descendant of Saul 1 Chronicles 8:35 = מִּיתֹן 9:41, Φιθων, Φαιθων, ᵐ5L Φιθωθ.
פכך (√ of following; compare Late Hebrew מֵּךְ flask, also מִּכְמֵּךְ trickle, denominative, or < onomatopoetic).>