You're composing a piece for DAD for Father's Day right?
There is some mnemonic idea, Buzan I think was the name of the guy who made it, that translates numbers 1-9 and 0 into the sounds of the letters.
Let's see...
1 = t, th, d
2 = n
3 = m
4 = r
5 = l
6 = j, soft g, etc.
7 = k, hard g, hard c, etc.
8 = f, v, ph
9 = p, b
0 = z, s, and soft c
There's more to it, but it does limit the numbers to 10. Pretty close to a music scale.
Vowels, y, and h can be anywhere.
Franz would be FRNZ or 8420.
I don't know how the rest would work out, whether you number the major scale (too many numbers) or number the chormatic (too few numbers).
Do, re, mi, fa, sol, la, ti, do, re, mi
1 , 2, 3, 4, 5, 6, 7, , 8, 9, 0
Do, di, re, ri, mi, fa, fi, sol, si, la, li, ti, do
1, 2, 3, 4, 5, 6, 7, 8, 9, 0
Oh well. It almost works. But almost isn't good enough.
Although, I suppose it really wouldn't matter. If you put it over a major or minor scale, it sort of works. And a composer might want to vary things -- a major third here, minor there, but still a third, still that letter.
Do Re Me/Mi Fa Sol Le/La Te/Ti Do
1/8 2/9 3/0 4 5 6 7 8
That seems as musical as using letters. It's just luck that some names happen to work and others don't. It's not like Schumann's hidden names were more than overlaid "code" from what I understand.
That means BOB is BB or 99 or Re-re. A Bob motive.