出典:Wiktionary
With loss of original w-, due to Scandinavian una (“to reside, dwell”), from *wonstead, from won (“to reside, dwell”) + stead. More at wone, stead.
onstead (複数形 onsteads)
“onstead”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.