I think that you might have misspelt "Vincenzo" in your database. I saw "Vincenzio" and "Vicenzo", the latter which I have not ever seen used.
Vincenzo is a very traditional name used in Italy. Root is sam as Vincent. Nicknames that I have seen used for Vincenzo are:
Vi (VEE); Vinny; Cenzi (CHIN zee); and Enzo
BTW, according to my husband who wears this name, "Renzo" is the traditional nn for Lorenzo. "Enzo" is the traditional nn for Vincenzo. A Lorenzo with the nn " Enzo" would be very weird.
I just created a list of Italian boy names that could easily be used in Italy now, and a few of them were not linking to the name entries. I also saw a Nameberry Italian Name list and noticed that a few were missing from it: (let me know if you need pronunciations on any)
Davide (very popular in Italy)
Piergiorgio (Pier + another name is very common)
Nicola (Nicola is actually a unisex name in Italy more commonly used for boys with the nn Nico)
Xaviero (I have heard of someone using this name on a young child. Not sure how long it has been used there)
Rocco (considered almost too cool to use right now in Italy bc there is a very famous porn star named Rocco)
Tiziana is a name that I have heard of a couple of time in Italy. I think it is a really pretty name! One Tiziana said that her name was not that uncommon, but it was an old fashioned name (unlike Giulia, Sofia and Martina- which are the most popular now there).
It apparently is from an old roman name Titianus or from the Tizia family.
I just noticed that a bunch of Icelandic names I found in books are missing. For boys, Petúr is the variant of Peter (and it is also missing from the list of Peter's international variants), Bjartur even though I have no idea where it comes from (maybe Arthur?), and Erlendur which means foreigner (Erlend is also the first name of one of the singers of the Norwegian band Kings of Convenience). For girls, Sóllilja which means sun lily in translation, and is the middle name of the daughter of the protagonist of Independent People, a book by Halldór Laxness. Speaking of well-known Icelandinc personalities, Jónsi is the frontman of the band Sigur Rós; I think it is a variant of John, but I'm not so sure.
Also, I second everything finuneby has said about Italian names. We also have Pierluigi in the Pier+something family, and Tiziano -like the painter- is not uncommon either, just like Tiziana.
I know there are more pressing issues with NB at the moment, but I hope this thread still gets checked every once in a while!
I have loads I could add, but the one I've been most surprised at not being in the database is Aled, which bethlow mentioned pages back. It was once at #312 in the E&W stats, it is still in the top 1000 and was in the Welsh top 100 for a while. It's a name most people would know over here as I'd say Aled Jones is a fairly well known bloke :)
Yeah, I really hope some Turkish and Farsi names get added... there are very, very few. Two I'm stunned aren't in here: Mavi and Levent, both Turkish boys names.
P.S. Your also missing Evren, a common male Turkish name.
Kanoa and Keoni are two Hawaiian names for boys. Kanoa can be used for girls, but I believe it is mostly used for boys.
And a more outlandish Hawaiian name... Lili'oukalani. (Lee-lee-ooo-kuh-lah-nee) I know, I know...but I think its stunning. A little history, it was the name of the last monarch of Hawaii, and the only queen that ever reigned.
Also, Ka'iulani. (Kuh-ee-ooo-lah-nee). Search her on google and find her full name! (Haha have fun pronouncing that!) She was the princess Hawaii and the heir to the thrown.
These are technically their middle names, but it was they were called.