@thoth
Allow me to point out a bit. I was answering Ultragotha's question.
"primarily European around medieval time, when there was still knights with shining blades and such" helps a bit.
But what flavor of knights in shining armor do you want? The flavor of society is going to be
very different if you model it on Germanic culture than if you model it on English or Spanish or French.
The height of the age of Chivalry was... 14th and 15th centuries I think.
Are you looking for titles of Nobility in England? Because they haven't markedly changed since then and you can look all that up in Burke's Peerage. Baronet is a newer title and you wouldn't want to use that but the others should work. Bear in mind that Viscount and Marquis are titles the English inherited from the French and if you want a more "pure" list of English-ish titles you might consider avoiding them.
If you're looking for how to address a Master Craftsman, some searching on Medieval guild structures will help.
If you just want to know how to address some random person with no rank, Goodman and Goodwoman (in England) might work.
You've got some leeway as you're writing Fantasy. But please make it consistent. (I love Lois McMaster Bujold's writing with a passion; but sorting through her use of titles of address in the Vorkosigan universe is ... confusing.)
NOTE that Kings were not called "Your Majesty" until the Holy Roman Emperor Charles V and King Henry VIII adopted that form of address in the early 16th century. Before then, Kings (in England at least) were addressed as "Your Highness". As your WIP seems to rely on history from before then, you might want to take this into consideration when deciding how to address the King or Queen (if you have one).
In my WIP, I'm using
"Your Grace" or "Lord Title" for Jarls
"Your Grace" or "Lady Title" for wives of Jarls
"Your Excellency" or "Lord Lastname" for Thengs
"Your Highness" or "Sire" for the King
"Lady/Lord Firstname" for children of Jarls
"Lord Lastname" for the eldest son of a Jarl.
But my WIP is set far later than yours and relies heavily on an Anglo-Saxon pre-conquest backstory (Fewer secondary titles in the Nobility mean that eldest sons don't pick up a courtesy lesser title from their father.)