View source for -onei̯

{{morpheme
|type_morpheme=inflectional
|function=dat. sg. (''on''-stem)
|language=Celtic
|analysis_phonemic=-/{{p|o}}{{p|n}}{{p|ei̯}}/
|from_pie=*-''on-ei̯''
|from_protocelt=*-''onei̯''
|checklevel=1
|problem=commentary - dating of -onei vs. -oni
}}
== Commentary ==
Cisalpine Celtic documents the retention of the original dative ending -''ei̯'' in ''on''-stems, which has been replaced by the locative singular ending -''i'' in Transalpine Gaulish and Old Irish, and is also attested in Cisalpine Celtic (see {{m||-oni}}) ({{bib|Eska & Wallace 2001}}, {{bib|Eska 2009}}: 23, {{bib|Eska & Evans 2009}}: 36). The rationale of the chronological and linguistical mapping of the two endings in the Cisaline Celtic evidence is not quite clear yet.
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