Bosnia Herzegovina is populated by three nations: Bosniaks (Muslim), Serbs (Orthodox Christians) and Croats (Catholics).
Based on first names you listed here, I think your Tutic' are Croats (Catholics).
Part of Bosnia where S. Most is was pretty damaged during the last war, and very few Croats are left there. I think you should contact parish office with your questions. Their address and phone/fax number:
Crkva Uznesenja BDM, Banjalucka 63, SANSKI MOST 79260, BOSNIA HERZEGOVINA
Phone/ Fax:00 387 37 686 987
Found this web page for Sanski Most; there’s a list of email addresses but no Tutic’s.