From Wiktionary, the free dictionary
From jasy (“moon”) + porundy (“nine”).
jasyporundy
- September
- (Gregorian calendar months) Gyregório arapapaha jasy; jasyteĩ, jasykõi, jasyapy, jasyrundy, jasypo, jasypoteĩ, jasypokõi, jasypoapy, jasyporundy, jasypa, jasypateĩ, jasypakõi (Category: gn:Months)