Apparently from guwph or nagaph and ash; exterminator of (the) moth; Magpiash, an Israelite -- Magpiash.
see HEBREW guwph
see HEBREW nagaph
see HEBREW ash
H4047. Magpiash
מַגְמִּיעָשׁ proper name, masculine a chief of the people, Nehemiah 10:21, ᵐ5 Βαγαφης, A Μαιαφης, ᵐ5L Μεγαιας.