The extinct Palta language of the Ecuadorian Amazon is attested by only a few words: yumé 'water', xeme 'maize', capal 'fire', let 'wood' (Jiménez de la Espada, 1586), and some toponyms. Based on this, Jacinto Jijón y Caamaño (1936) classified it as a Jivaroan language. Kaufman (1994) states that there is "little resemblance", but Adelaar (2004) finds the connection reasonable. In addition to these four words are typonyms, which commonly end in -anga, -numa, -namá. The latter two suggest the Jivaroan locative case

Locative case

Locative is a grammatical case which indicates a location. It corresponds vaguely to the English prepositions "in", "on", "at", and "by"...

 suffix -num ~ -nam, though Torero (1993) notes that the last resembles Aguaruna

Aguaruna language

Aguaruna is an indigenous American language of the Jivaroan family spoken by about 45,000 Aguaruna people in Peru. The speakers live along the western portion of the Marañón River and also along the Potro, Mayo, and Cahuapanas rivers. Native speakers currently prefer the name Awajún. According to...

(Jivaroan) namák(a) 'river' as well.