Re: [tied] The "Mother" Problem

>From what I understand, Vedic had anomalous genitive forms for both
>of those words: ma:túh "mother's" and pitúh "father's", as if from
>IE *maxtr's (stress on syllabic /r/) and *pxtr's, respectively.

These are the regular genitive singular for stems in vocalic -r., e.g.
da:tr. "giver" has gen sing da:tuh. The only anomaly in the father/mother
declension is that the accusative plural of feminines is not -r.:n
but -r.:h. Both accustives, however, clearly go back to an original PIE
ending -ns, which survives in sandhi. the gen sing goes back, as you say,
to -rs.

Peter