aside: Nada is a girl's name, a type of yoga and a band!

Maybe I'm going out on a limb here,...
'Typ' is type (i.e. sort), in a couple of languages (e.g. German)
and 'nada' is used in various languages as nothing or none ... so maybe it meant
'typ:nada' or type:none
That seems a tad too elaborate though.
I'd hazard a guess it's just naming-scheme.