Puzzle No. 1 [SOLVED]

Please email your answer, or any questions, to info at rittenhousesociety dot com.

Your last name means many things:

A string of flags; a bird, which sings;

A way to put a ball in play;

What does this string of numbers say?

14;21;13;2;5;18;19 / 20;5;12;12 / 1 / 19;20;15;18;25

[A: "numbers tell a story"]