The Collaborative International Dictionary of English v.0.48:

Arval \Ar"val\, n. [W. arwyl funeral; ar over + wylo to weep, or
   cf. arf["o]l; Icel. arfr inheritance + Sw. ["o]l ale. Cf.
   Bridal.]
   A funeral feast. [North of Eng.] --Grose.
   [1913 Webster]