Original: The name '' ABBA '' is an acronym formed from the first letters of each of the group members ' given names ( Agnetha , Björn , Benny , Anni-Frid ) , and the group took this name officially in late 1973 .
Simplified: The name '' ABBA '' is made from the first letter of each member 's first name : Agnetha Fältskog Björn Ulvaeus Benny Andersson , and Anni-Frid Lyngstad .