Probably from aram; the plane tree (from its smooth and shed bark) -- chestnut tree.
see HEBREW aram
H6196. armon
עַרְמוֺן noun [masculine] plane-tree (as stripped of bark); — ׳ע Genesis 30:37 (J); plural עַרְמֹנִים Ezekiel 31:8.
מַעֲרֻמֵּיהֶם2 Chronicles 28:15 see below II. עור.