Elga is of Scandinavian origin, derived from the Old Norse 'Helga', which means 'holy' or 'dedicated to the gods'. This name has been used in various forms across different cultures throughout history. In English-speaking countries, it was popular during the late 19th and early 20th centuries but has since become less common.
"Elga was quite popular as a girl's name in the early 20th century, with 5 babies named Elga born each decade between 1917 and 1927."