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Webster 1913 Edition

Noun.

[L.

parentatio

, fr.

parentare

to offer a solemn sacrifice in honor of deceased parents. See

Something done or said in honor of the dead; obsequies.

[Obs.]

Abp. Potter.

Noun.

[from L. parento.]

Something done or said in honor of the dead.

parentation ‎(plural parentations)

(obsolete) Something done or said in honour of the dead; obsequies.
- Archbishop John Potter
  Children and Heirs shall perform the accustom'd Rites of Parentation.