Albert II, Prince of Monaco
As Monaco's head of state, Prince Albert II is depicted on coins, including collectors' coins, with very rare exceptions. One of the most recent examples is the €5 silver Prince Albert II commemorative coin, the first commemorative coin with his effigy on it, minted in 2008. On the obverse, the prince is depicted in profile with his name on the top of the coin. On the reverse, the Grimaldi coat of arms appears; around it, the words "Principauté de Monaco" (Principality of Monaco) also appear along with the nominal monetary value of the coin.As the prince, his official shortened title is "His Serene Highness Albert II, Sovereign Prince of Monaco"; this does not include the many other styles claimed by the Grimaldi family.
House of Grimaldi
By convention, sovereign European houses are reckoned in the male line. Therefore, since 1731, it has been determined genealogically that it was in fact the French noble that ruled as Princes of Monaco until 1949. However, one of the terms of James de Goyon de Matignon becoming Prince of Monaco "jure uxoris" was that he adopt the name and arms of Grimaldi so that the house would be preserved on the throne, and the right of succession was through his wife Louise-Hippolyte Grimaldi, who abdicated in her husband's favour. Similarly, when Charlotte Louvet was legitimised in 1911 and made successor to Monaco, her husband, Count Pierre de Polignac, adopted, as a condition of the marriage, the name and arms of Grimaldi. In this way the "Grimaldi" name and arms were continued. There is a branch of the Grimaldi family in England who believe they have more right to the throne as they are descended from an all-male line from Alessandro Maria Grimaldi, an exile from Genoa, himself a direct descendant of Otto Canella, the father of Grimaldo Canella, who started the patronymic "Grimaldi."