What ethnicity were the people of Medieval Bosnia?

[Pribislav]

In Croatia mostly Croatian. Anyway, Nino is typical Dalmatian name. First Croatian capital was Nin and famous church exist there.
https://en.wikipedia.org/wiki/Nin,_Croatia

Croatian sources hahaaa... According to Croatian sources my surname and native surname of my mother are pred. Croatian.

Dalmatian Nino is originaly Italian, and not conected with Ninoslav https://en.wikipedia.org/wiki/Nino_Cerruti

[Dna8]

Is Mikulandra predominantly

Serbian last name
Croatian last name
Croatian last name today (Catholic Serb last name before)

?

[Decius]

Serbian.

[Mingle]

Bosnian ruler Matej Ninoslav clearly said in his charter from mid of 13th century that inhabitants of Bosnia are Serbs (marked with red color).

I already covered this in the OP under the heading "Serbian Bosnia". The charters weren't written by Ninoslav himself but by his Dubrovnik-based notaries Paskal and Desoje. This wasn't the original charter, but an addendum to the charter that was added later. A document sent by Ban Kulin in 1189 doesn't recognize the name "Serb".

Here is a website that discusses the issue in detail in your language if you would prefer to read this instead: https://www.hercegbosna.org/STARO/ostalo/srp_ban.html

The website is a pro-Croat one so you can dismiss it as Ustasha propaganda if you want, but they have their citations at the bottom and their explanation seems reasonable to me.

There were also instances where Serbs were incorrectly called Croats even though its clear that these people were 100% Serb. So if Serbs can be confused for Croats, can't Croats be confused for Serbs?

Bosnians being Catholic (but no evidence existing of a significant amount of Serbs being Catholic) and Bosnians using some exclusively Croatian names (but no exclusively Serbian names) makes them seem like its more likely that they were Croats than Serbs.

[Cumansky]

When Bosnian people retain surname (Bosnjak), what it can be said of their origin? You said this is mostly in use by Croats in modern time..

[Hrvoje Vukčić Hrvatinić]

I already covered this in the OP under the heading "Serbian Bosnia". The charters weren't written by Ninoslav himself but by his Dubrovnik-based notaries Paskal and Desoje. This wasn't the original charter, but an addendum to the charter that was added later. A document sent by Ban Kulin in 1189 doesn't recognize the name "Serb".

Here is a website that discusses the issue in detail in your language if you would prefer to read this instead: https://www.hercegbosna.org/STARO/ostalo/srp_ban.html

The website is a pro-Croat one so you can dismiss it as Ustasha propaganda if you want, but they have their citations at the bottom and their explanation seems reasonable to me.

There were also instances where Serbs were incorrectly called Croats even though its clear that these people were 100% Serb. So if Serbs can be confused for Croats, can't Croats be confused for Serbs?

Bosnians being Catholic (but no evidence existing of a significant amount of Serbs being Catholic) and Bosnians using some exclusively Croatian names (but no exclusively Serbian names) makes them seem like its more likely that they were Croats than Serbs.

Genetically also, Bosnians are closer to Croats from Croatia than to Serbs from Serbia. ydna + autosomal both.

[Pribislav]

I already covered this in the OP under the heading "Serbian Bosnia". The charters weren't written by Ninoslav himself but by his Dubrovnik-based notaries Paskal and Desoje. This wasn't the original charter, but an addendum to the charter that was added later. A document sent by Ban Kulin in 1189 doesn't recognize the name "Serb".

Here is a website that discusses the issue in detail in your language if you would prefer to read this instead: https://www.hercegbosna.org/STARO/ostalo/srp_ban.html

The website is a pro-Croat one so you can dismiss it as Ustasha propaganda if you want, but they have their citations at the bottom and their explanation seems reasonable to me.

There were also instances where Serbs were incorrectly called Croats even though its clear that these people were 100% Serb. So if Serbs can be confused for Croats, can't Croats be confused for Serbs?

Bosnians being Catholic (but no evidence existing of a significant amount of Serbs being Catholic) and Bosnians using some exclusively Croatian names (but no exclusively Serbian names) makes them seem like its more likely that they were Croats than Serbs.

I realy don't want discussion about ustashian propaganda, it's disgusting.

Do you deny written Serbian name in charter of Matej Ninoslav? If you deny, it's too much from Pashtun living in New York...

If there are charters of Bosnian rulers on chakavian than their Croatian origin would be possible. But they were native shtokavians and all charters are on shtokavian, not on chakavian (Croatian language).

Tvrtko I was crowned in Serbian Orthodox monastery Mileševa 1377 https://en.wikipedia.org/wiki/Tvrtko...nia#Coronation
If he was non-Serb and non-Orthodox he never crowned in Serbian Ortxodox monastery. Think about that...

[Hrvoje Vukčić Hrvatinić]

Tvrtko I was crowned in Serbian Orthodox monastery Mileševa 1377 https://en.wikipedia.org/wiki/Tvrtko...nia#Coronation
If he was non-Serb and non-Orthodox he never crowned in Serbian Ortxodox monastery. Think about that...

You should post entire quote lmao.

Tvrtko's coronation as King of Bosnia and Serbia was held in the fall of 1377 (probably 26 October, the feast day of Saint Demetrius), but there is no consensus as to where it took place. The Ragusan chronicler Mavro Orbini wrote, in 1601, that the coronation was performed in the Serbian monastery of Mileševa by its Orthodox metropolitan bishop, an opinion accepted today only in Serbian historiography. Citing more recent archaeological and historical research, Croatian and Bosnian historians agree that the coronation more likely took place in the Franciscan Church of Saint Nicholas in the Bosnian town of Mile, which is the undisputed place of the coronations of Tvrtko I's successors.

No Serbs named Tvrtko neither than, or now.

[Pribislav]

You should post entire quite lmao.

Tvrtko's coronation as King of Bosnia and Serbia was held in the fall of 1377 (probably 26 October, the feast day of Saint Demetrius), but there is no consensus as to where it took place. The Ragusan chronicler Mavro Orbini wrote, in 1601, that the coronation was performed in the Serbian monastery of Mileševa by its Orthodox metropolitan bishop, an opinion accepted today only in Serbian historiography. Citing more recent archaeological and historical research, Croatian and Bosnian historians agree that the coronation more likely took place in the Franciscan Church of Saint Nicholas in the Bosnian town of Mile, which is the undisputed place of the coronations of Tvrtko I's successors.

No Serbs named Tvrtko neither than, or now.

One Serbian family from Jajce in central Bosnia most likely originated from Kotromanić dinasty. It's about genetic. More about that soon, when I took enough material.

[Hrvoje Vukčić Hrvatinić]

First known ruler of Bosnia ever, Ban Borić, was not native Bosnian. He (most likely) came from Central Slavonia to Bosnia. https://en.wikipedia.org/wiki/Ban_Bori%C4%87