Arms of an independent Jacobite Scotland under the House of Wittelsbach (via the houses of Savoy and Austria-Este), before and after the arms being modernized and simplified in thr 1950s (monarch list)
There are couple of issues with Coat of Arms of Belarus. The design adopted in 1991 is too similar to the Coat of Arms of Lithuania since Belarus basically copied the historic Lithuanian design. The Coat of Arms of Belarus adopted in 1995 is too communist. So I made an alternative version of the Coat of Arms of Belarus
I am not the most skilled in complex graphics (I work in MS Paint only) but here are three Coats of Arms for the same timeline.
Coat of Arms of the House of Osman in exile, descended from Cem Sultan, son of Mehmed II "Conqueror". The Star and Crescent on red symbolizing their claim on the Ottoman Empire and their Turkish origin. While the blue chief with the gold double-headed eagle symbolizing their claim on the (Eastern) Roman Empire. Eagle also charged with the Tughra of Mehmed II on its chest, further symbolizing their ancestors and the legitimacy of their claims.
This arms were adopted by "Murad III", son of "Cem I" after he had failed to conquer the Ottoman Empire, while Selim I was off conquering Egypt, and converted to Catholicism. His son Gabriel/Cebrail was born and raised Catholic and spoke Italian as his primary language. He had also created and led a mercenary company. "Osman II" was son of Gabriel and was initially Catholic and spoke German as his mother language. He would later be hired and went with his company to England where he would serve Queen Mary on suppression of Catholics but later converted to the Church of England and would end up marrying Queen Elizabeth. His son with her Alexander/Iskender was both the King of England and Ireland (while also claiming France) and the claimant to the Ottoman Empire (including the Caliphate).
King Alexander I and his son King Solomon I would use the above Coat of Arms starting with Alexander's coronation at 1603 until 1660 coronation of Solomon as King of the Scots following "the British Revolution" (republican revolt in England against Solomon I and in (Northern) Scotland against Charles I the Prince of Scotland, an English vassal (Kings of Scotland reduced to that and lost Southern Scotland to the English after the English War of Succession after Alexander's ascension)). This coat of arms were replaced with one that also included the Scottish arms and was used by British monarchs from Solomon I starting with 1660 until 1801 when the 2nd Act of Union was passed under Queen Elizabeth II. With which the Irish Harp was added on the coat of arms.
After the death of Queen Elizabeth II in 1820, the King Alexander of the Netherlands would become the King Alexander III of Great Britain and Ireland (who was also an Osman-Tudor, from a cadet branch created by the younger brother of Alexander I). His son, William III (in both realms) would succeed him in 1837 and would in 1848 have the 3rd Act of Union passed, creating the United Kingdom Great Britain, Ireland and the Netherlands. That new kingdom would adopt the above coat of arms and it has remained in use since, still being in use today.
Been doing some research for a possible TL and tried to recreate the royal seal of King Bermudo III de Léon. The text around it reads "regni imperii Veremundus rex Legionensis" that was the title he had used in 1034.