Genetics confirm historical records only for Croat arrival to Balkans.
From 5th century exclusively Croatian.
As far as I know, migration starts from White Croatia or few hundred years earlier.
http://www.waughfamily.ca/Ancient/Tree and Map for Hg I.pdf
https://www.google.com/maps/d/viewer?hl=en&mid=1uIEV-Unzie9mLufrQJyWb4fD9zg
Already I gave what Dr Francesco Borri (Institute for Medieval Research of the Austrian Academy of Science, Vienna) wrote. Younger people (in this case Croats) took legends of arrival from older people (Bulgarians, Scythians). Porfirogenit had story about Croats because he had goal, he thought they may make good allies against the Bulgars. Dr Borri claims that Croats very late formed as nation, 9-10 century (not as you claim in 5th century).
Quote:
“Who, therefore, were the Croats? At the moment this question is still difficult to answer. Milo Barada suggested that the Croats were a group formed at the edges of the Avar empire and Walter Pohl proposed the Croats to be border guards of the Avar empire, developing in an ethnic group only in the ninth century. I suggest that we should date this process even later. Constantine wrote in the
DAI about a Croatian victory against the Bulgars: does this event represent the formation of a new elite on the Dalmatian edges of the Bulgar kingdom? “
“In conclusion, we can assert that the Croatian migration did not take place, but that Constantine Porphyrogenitus created it relying on the literary models traditionally applied to describe the
Landnahme of Scythian Barbarians. “
What we can see, historians very appreciate Dr Borri. For example Slovakian historian Adam Mesiarkin (Comenius Unuiversity in Bratislava) writes, quote:
“We agree with the author* in the question of a „general“ construction of the mentioned parts of the text of DAI”,
*Dr Adam Mesiarkin speaks about author who is Dr Borri.
And after, Dr Mesiarkin argues, quote:
“The fact that Constantine Porphyrogenitus did not have to describe the situation from the first half of the seventh century is not important at this moment. It is important that he wrote down a myth, which lived and stood in the centre of the ethnogenesis, of the memory of the elite – which created a political-ethnic group. They maintain the myth of the arrival to the country with a permission of the emperor – for the absolute right for taking the land.“
“In spite of naming the Croats as Slavs in Latin sources, probably due to their language, Croatian identity was not Slavic. They turned away from the Slavs and Avars in their
origo and the Slavic identity probably existed beside the Croatian identity. In addition, it is not the subsequent evolutional phase of the development of Illyrian (if there was something like that) identities mixed with Gothic or Slavic identity. It is something new, created at the time of the changes inside the khaganate and the transformations in the orbit of Frankish domination in Europe.”
You can see contemporary historians in scientific journals write the opposite what you write. They are PhD, experts, authorities and their papers are in world base of science. I told you more time if you want change anything you must write scientific paper and publish in relevant scientific journal otherwise as layman you have no chance, you can be on forums for years and decades and everything will be the same as today.