Female first name (German, English, French): Erica, the sole ruler, Old Norse (two-part name); aen = alone; rikr = the ruler, the name as female form of 'Eric' fused with the identically written name deriving from the German / Latin name for heather (the plant), the name only became popular towards the end of the 18th century, information on male form Erich:; made famous as the name of Swedish rulers, 'Erik' is a very common name in Sweden