Marino and Marina are common given names in Italy (same roots of the word "Mare").
Of course , what are you trying to say
a lot of Christian names became surnames in the veneto and I assume other regions
Santolin ..........from santo
Bortolin ..........from bortolo ( meo )
Michielin ..........from Michiel ( michele )
Guidolin ........from Guido
others went down the surname endings with either, ato, otto, igo, acco, er, in, and a few others
Mare and Pare is mother and father in venetian
or the less formal , mama and papa are used for parents
Madre and Padre are used solely for the religious side as in nuns and priests
i ending surnames do not originally exist in the Veneto ...........they are either due to other italian migrating or later in the 18th century being used to replace the term detto ( some say ) ...........so you would have a town with very many of the same surnames , so originally detto used
eg ......Zaia detto stival ...........Stival ( boot maker ).......this Zaia family was the ones known as boot makers ..................or you could have Zen detto Ros , either this Zen family had red hair or married with the Ros family
the i came into effect to represent many or another form to replace detto