In Piva, a historical tribe of Old Herzegovina (now western Montenegro), there was a brotherhood (bratstvo) named Ruđić (Serbian Cyrillic: Руђић). The surname was mentioned in Church Slavonic documents of the Serbian Orthodox Hilandar monastery. The Ruđić brotherhood from Rudinice (in Plužine), which later dispersed elsewhere, is one of two family trees in Piva from which many Pivan families descend from. Several families are noted in Serbian ethnographic studies as having descended from the old brotherhood of Ruđić (Ruđići).
According to folklore, hajduk Bajo Pivljanin (1630–1685) was born in Rudinice (now in Plužine) in Piva, belonging to the Ruđić brotherhood.Savatije Ljubibratić (1660–1716), the Serbian Orthodox metropolitan, belonged to the brotherhood.