Is Bjorn really Ragnar's son?

Related questions

1. Is Rollo Lothbrok a real person?
2. Does Rollo die Vikings?
3. Is floki in Season 5 of Vikings?
4. Is Bjorn Ragnar's son?
5. Did Rollo marry the French princess?
6. What is wrong with Ragnar's 5th son?
7. Who killed Ragnar Lothbrok?
8. Where is Kattegat from Vikings?
9. Was Ivar the Boneless real?
10. Was floki a real Viking?

Tags

1. #uncle
2. #kattegat
3. #ragnar
4. #eldest
5. #ironside
6. #lagertha
7. #rollo
8. #father
9. #might
10. #biological
11. #although
12. #believes
13. #revealed
14. #later
15. #lothbrok