The name Robert is an ancient Germanic given name, from Proto-Germanic *Hrōþi- "fame" and *berhta- "bright" (Hrōþiberhtaz). Compare Old Dutch Robrecht and Old High German Hrodebert (a compound of Hruod (Old Norse: Hróðr) "fame, glory, honour, praise, renown, godlike" and berht "bright, light, shining"). It is the second most frequently used given name of ancient Germanic origin. It is also in use as a surname. Another commonly used form of the name is Rupert.
https://en.wikipedia.org/wiki/Robert