A word a “mason (sculptor)” in notes from the late 1960s, a combination of ondo “stone” and tamo “smith” (PE17/107-108).
Neo-Quenya: For purposes of Neo-Quenya, I would use this word mainly for stone craftsmen = “mason”. For a stone artist = “sculptor” I would use ondomaitar.
ontamo noun "mason (sculptor)" (PE17:107-108); this is a compound on(do) "stone" + tamo "smith".