Richelda (I) derives from Ancient Germanic name Richild, derived from Germanic root rîcja (mighty, strong, powerful), Gothic reiks (king, ruler), Celtic rîg or rix (ruler, king), and Old Norse hildr (battle).
Rosuccia (I) is a diminutive of Rosa (rose).
Rambaldo (T) derives from Ancient Germanic name Ragimbald, composed of roots ragin (advice) and bald (bold). This name was also Venetian.
Rinieri (I) derives from Ancient Germanic name Raganhar, composed of roots ragin (advice) and hari (army).
Rizardo (T) is a form of Richard, which means “brave ruler” and derives from Ancient Germanic roots ric (ruler, mighty) and hard (hardy, brave). This name was also Venetian.
Robaldo (I) derives from Ancient Germanic name Rotbald, composed of Germanic root hrôthi (fame) and Old High German bald (bold, brave).
Ruggieri (I) is a form of Roger, which means “famous spear.”
Rustico (I) means “rustic, rural.” This is the name of the male protagonist in the most famously dirty story of The Decameron. I can practically recite that story by heart.