Could you elaborate a little on the time period (and region, if Spain or England vs. the Americas) you’re asking about? Similar to how using “Sir” as a knighted title versus “sir” as simply a respectful form of address for an adult male differ, “Don” in say early 1800s California was simply a title to address a landowner- prior to that I’d have to let someone else step in or do more research, but knowing a year would be helpful