14.

BROTHERS
Vito Maria Sarli                            Rocco Sarli/Joseph Louis Mott

FIRST COUSINS
SARLI                                           MOTT
Egidio Antonio                              Joseph "Elmer"
Francesco Antonio                        Joel "Heber"
Battista                                          Jacob Lyman 
Maria Carmela
(She married Luigi De Carolis) 

SECOND COUSINS
The children of the Sarli, De Carolis, and Mott First Cousins above.

THIRD AND FOURTH COUSINS & DNA
If you have taken an autosomal DNA test through Ancestry, Family Tree, 23 and Me, etc., you can expect to see many surnames, but if you zero in on ancestors born in Laurenzana, you will probably be on the right track.

Two men from the Mott line have taken the Family Tree Y-DNA test and they both matched a man born in the town of Potenza with a Sarli surname, 36 out of 37 markers. This is an almost perfect match. The 1-marker difference can be ascribed to genetic mutation. Folks, this is proof-positive.