rico (Old Portuguese) comes from Gothic 𐍂𐌴𐌹𐌺𐍃, from Proto-Germanic rīkijaz, from Proto-Germanic rīks, from Proto-Celtic rīxs, from Proto-Indo-European h₃rḗǵs, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.
rico (Old Portuguese): rich