Just list your Pedigree back to your earliest verified (paper trail) Marselis/Marsalis/Merselis/Marseilles/ etc etc etc line.
It is free. You may find some connections to NY, NJ, Canada or even Europe (if we can get a male Marselis to test)
Only males who bear the Marsalis/Marselis and variant spellings need to test.
We need descendants of other lines!
The three males who have tested so far are all descendants of 3 different sons of Peter Hutchins Marsalis and Mary Magdalene Gordon Marsalis. His pedigree and his descendants' pedigrees are posted at the site.
I have been searching the NC Archives and online steadily and have still not been able to confirm Peter H.'s mother's name and family nor his wife MM's(Polly's) Gordon line. I have found errors in her assumed Gordon line. Wrong Polly and wrong Thomas. I keep thinking she may possibly have originated in NJ like the Marselises and the Hutchins. Regardless the hunt continues. No theory ruled out.