This is a complicated subject, so I will try to keep it simple and brief,
which is not easy.
From the web site en.wikipedia.org/wiki/...oup_N-M231
Haplogroup N-231 has a wide geographic distribution throughout northern Eurasia, and it also has been observed occasionally in more southerly areas,
including Southeast Asia, Nepal, Southwest Asia, and Southern Europe. Its highest frequency occurs among the Finnic and Baltic peoples of northern Europe,
the Ob-Ugric and Northern Samoyedic peoples of western Siberia, and the Siberian Turkic-speaking Yakuts (McDonald 2005). It is also carried by about 10% to 20% of Russians (Malyarchuk 2004).
So, you are correct to say your Haplogroup occured in the Baltics, but, as you can see, that is not the only place.
I don't know who you tested with. If it was Family Tree DNA
then I would suggest you do a couple of things.
First, you need to do at least 67 markers. I know it cost more, but 12 markers are not enough.
Second, you need to compare these results with similiar surname project groups or join the Sicilian DNA Project Group.
After you have done this, you will still need a paper trail to prove any connections that the DNA suggest you have.
If you have not researched all available civil records for the DiPasquale family in Palermo at least back to 1800, you need to do this first.
It will probably be difficult to prove your family is part of the House of Pasquale,
but you know they are from Sicily, so you are off to a good start.
Hope this helps,