In addition, to the groups that clearly spoke dialects of Umbundu, there were two on the periphery of Ovimbundu distribution: the Mbui, who seemed to straddle the linguistic boundary between the Ovimbundu and the Mbundu; and the Dombe living to the west near the coast, whose language was closely related to Umbundu, although not a dialect of it. The Dombe and several other groups, including the Nganda and the Hanya (who, according to one account, spoke Umbundu dialects) relied on cattle raising, as did their southern neighbors, the Herero and the Ovambo. Still others, typically the old tributary kingdoms, came to speak Umbundu relatively recently.