Countries that mention each other in their anthems in Europe 

In the video you will see which countries mention each other in the anthem. People in the anthem from a foreign country are also taken into account, they also count as the mentioned country :)
*= Mentioned in already unofficial verse or in extended version of an anthem
Norway- Sweden, Denmark, Rome
UK- Scotland
Ireland- Saxons*
The Netherlands- Israel, Spain, Germany
Poland- Sweden, France, Italy, Germany*, Moscovy*
Andorra- Caroligian Empire, Umayyad Caliphate
Italy- Poland, Russia, Austria
Hungary- Ottoman Empire
Ukraine- Cossacks, Moscovy*
Romania- Roman Empire, Moldova, Hungary, Ottoman Empire*
Bulgaria- USSR*
North Macedonia (Fyrom)- Republic of Kruševo