It's 7-up n' Grenadine (cherry syrup)...it's more of a kids drink as I remember it. I used to get them at Red Lobster all the time when I was a kid, came with a cherry with a plastic red pirate sword through it...good times.
Ginger Ale and grenadine - given to children to make them feel like they fit in - while the adults are drinking. Technically, the Shirley Temple is given to girls and Roy Rogers to boys - but its the same thing.
Tractortug nailed it. Shirley Temple was a female child actor. The drink was non - alcoholic, with various ingredients depending on the recipe, but all recipes named Shirley Temple. I will have to quit staying away so long, you all just have too much fun!!