Nonni may refer to: Nonni river, an alternate name for Nen River in Northeast China. Nonni, nickname of Icelandic children's author Jón Sveinsson. Nonni, Italian word meaning grandfathers or grandparents. Ottaviano Nonni (1536-1606), Italian painter. See also. Nonni and Manni, a 1988-1989 West German-Icelandic children's TV series https://en.wikipedia.org/wiki/Nonni