Did it have coconut?

Here is a link that might be useful: German chocolate pie

This may not be what you're looking for but I believe the pie got its name because it uses German Sweet Chocolate. I've also seen recipes for it called Chocolate Angel Pie or just Angel Pie. It's one of my favorites:

German Chocolate Pie

2 egg whites
1/8 tsp salt
1/8 tsp cream of tartar
1/2 cup sugar
1/2 cup nuts
1/2 tsp vanilla extract
1 package of German Sweet Chocolate
3 Tbsps water
1 tsp vanilla extract
1 cup whipping cream

Beat egg whites, salt, cream of tartar until foamy. Add sugar; beat until stiff peaks form. Fold in nuts and vanilla extract. Spoon into a greased 8" pie pan to form a shell. Bake at 300 degrees for 50-55 minutes. Cut oven off and leave pie shell in the oven for 50 more minutes.

Stir chocolate in water until melted. Cool. Add vanilla.

Whip the cream. Fold chocolate mixture into whipped cream; pile into meringue shell. Chill for 2 hours.