Complex sentence: The song was originally called "Come Softly", as written and arranged by founding lead singer Gretchen Christopher and the group was originally named Two Girls and a Guy, but both were changed en route to the song's becoming a chart-topper.
Split into simpler sentences: The song was originally called "Come Softly", as written by Gretchen Christopher. The group was originally named Two Girls and a Guy, but both the title and group name were changed en route to the song's becoming a chart-topper.