Favourite composer with three Ns in their last name

[North Star]

Zennlinsky and Nielsenn are no match for Henning.
Haven't heard or seen a note of Pekka Hannikainen's (1854-1924) music.

[Karl Henning]

Nonono

Very nnnice!

[springrite]

I was going to start a poll on composers with 4 A's in their last names. Then I realised that maybe Rautavaara is the only one?

[Karl Henning]

I was going to start a poll on composers with 4 A's in their last names. Then I realised that maybe Rautavaara is the only one?

Not even he (I make that 5 0:) )

[EddieRUKiddingVarese]

nVarèsenn

[bwv 1080]

nnessiaen
nnendelssohn

[listener]

Franco Mannino, perhaps, as he's one I have recordings of (a violin concerto and one for 3 violins (on Melodiya 562297 LP, for the curious).  You didn't say only four "a"'s so Rautavaara is correct there.
Peter Mennin or Kurt Kennan, Jannequin, Clément or Lindpaintner, Peter Joseph von are other choices.   While scrolling through my database I did notice the composer with three 'v''s in his surname.