Concerning your great grandfather Mathew Samuel Martinovic (1835?) I can not give you a direct reply as there not enough details, need more info. I will explain more about the Martinivici (plural form).
The Martinovici are from village(selo) Baice,the first of the martinovic had 9 sons. As you will quickly realize the family tree is quite wide therefore I need to know from which branch you great grand father came.
I suppose you can not answer my question. Please send me as much details as you can concerning your info e.g. you grand father whenhe left montenegro where is he born is wife etc etc. The martinovici where a prominent family in cetinje and one of the oldest with quite allot of documentation around . In cetinje there is an extensive archive with allot of details at the library .
I happen to know an old woman Ljubica Martinovic over a hundred years old which worked as a journalist. She remarkably knows allot about the past andknows allot about the past and has an extensive archive of pictures papers etc. Her sons Djoko and Branko and daughters Zorka and Desi Zivkovic. Could also help me and indirectly your family for your search of your descended. If you send me more info I Will try to obtain the family tree of the martinovic . In Montenegro family trees are well kept and I’m quite sure that I can find the details you are looking for .
About the picture(s) which are in possession of your cousin I can only ask you to scan the pictures and send them to me
Cetinje 2001 has roughly about 15.000 inhabitants (municipal 30.000) a hundred years ago there where aboutfixed 3000-4000 inhabitants. Looking at this perspective it is quite remarkable how with it s rich history with 12 embassy’sthey have a lot of documentation