1331, Antonio López Ferreiro, editor,Fueros municipales de Santiago y de su tierra, Madrid: Ediciones Castilla, page542:
de quanto centeo eauea e orjo labraren en ese Regengo ha de auer o arcobispo ou seu mayordomo a meadad despois que os labradores tomaren o seu dereito
of all the rye,oat and barley that they would grow in this crown's possession, the archbishop or his steward must have half of it, after the laborers have taken their parts
1409, José Luis Pensado Tomé, editor,Tratado de Albeitaria, Santiago de Compostela: Centro Ramón Piñeiro, page61:
Jtem. deue o potro comer feo, palla, herua, orio,auea, espelqa, que quer dizer melga, et as qousas semellauelles a esto, que naturalmente som para seu comer.
Item. The foal must eat hay, straw, grass, barley,oat, spelt —that is,melga— and things that are similar to these, which are naturally for them to eat
Barreiro, Xavier Varela; Guinovart, Xavier Gómez (2006–2018), “auea”, inCorpus Xelmírez: corpus lingüístico da Galicia medieval [Corpus Xelmírez: linguistic corpus of Medieval Galicia] (in Galician), Santiago de Compostela:Instituto da Lingua Galega
The verbavea has three conjugations, shown below: one when used as afull verb or to form the future tense (el/ea are), one when forming the compound perfect tense (el/ea a) and one when forming the conditional present and past tenses (el/ea ar).
Note that the singular pluperfect formsavusem,avuseși andavuse, as well as the third plural formavuseră, are to be avoided. The formsavusesem,avuseseși,avusese andavuseseră should be used instead. See here:https://dexonline.ro/definitie/avea/paradigma.