Since nn are not registered like the formal name. But maybe you just mean "well known" nick names?Elizabeth
has so many nn, so I don't find Beth
the "official one". It could just as well be Ellie
and Bettan are the most popular ones in Sweden.
And there must be nn which can be used for more than one formal name. Like Josie
for both Josephine
"You sought a flower and found a fruit. You sought a spring and found a sea. You sought a woman and found a soul. You are disappointed." (Edith