From the Old Norse personal name Rögnvaldr (composed of regin ‘advice, decision’ (also, ‘the gods’) + valdr ‘ruler’). This name was regularly used in the Middle Ages in northern England and Scotland, where Scandinavian influence was strong. It is now widespread throughout the English-speaking world.
Italian, Spanish, and Portuguese: ethnic name for someone from Lombardy (see Lombard) specifically, or more generally for someone from northern Italy, as opposed to the south (i.e. the area once under Byzantine rule). In the form Lombardos it is also found as a Greek family name.