The glamorous minor European royals you've NEVER heard of

There's certain royals that mostly need no introduction regardless of who you're talking to - from King Charles to Prince Harry and Kate Middleton. PRINCESS MARIA CHIARA DI BORBONE-TWO SICILIES Princess Maria Chiara Di Bourbon-Two Siciliesa, 17, pictured in Paris, comes from a cadet branch of the Spanish royal family, which descends from the Capetian Dynasty and ruled over Southern Italy and Sicily during the 18th and 19th centuries Princess Maria Chiara Di Bourbon-Two Sicilies, 17, pictured in St Tropez, is the daughter of Prince Carlo, Duke of Castro and Princess Camilla, Duchess of Castro Princess Camilla de Bourbon Siciles with her daughters Maria Carolina de Bourbon Siciles and Maria Chiara de Bourbon Siciles attend the wedding of Prince Jean-Christophe Napoleon and Olympia Von Arco-Zinneberg at Les Invalides on October 19, 2019 in Paris Chiara loves fashion, make-up and is making her way in the world as a 17-year-old socialite Princess Maria Chiara Di Bourbon-Two Sicilies, 17, is the daughter of Prince Carlo, Duke of Castro and Princess Camilla, Duchess of Castro. PRINCESS MAFALDA OF BULGARIA Princess Mafalda of Bulgaria, 28, is the daughter of Kyril, Prince of Preslav, who attended Prince Philip 's Service of Thanksgiving, and granddaughter of King Simeon II, also known as Simeon Saxe-Coburg-Gotha, the last reigning Tsar of Bulgaria and later served as Prime Minister Based in New-York, the princess, a 'modern society swan' and singer-songwriter, was born and raised in London alongside her siblings Olimpia and Tassilo before moving to the US for university Talented: Mafalda, pictured on holiday, enrolled at the Berklee College of Music, in Boston Princess Mafalda of Bulgaria, 28, is the daughter of Kyril, Prince of Preslav, who attended Prince Philip's Service of Thanksgiving, and granddaughter of King Simeon II, also known as Simeon Saxe-Coburg-Gotha, the last reigning Tsar of Bulgaria and later served as Prime Minister. PRINCE SEBASTIEN OF LUXEMBOURG Prince Sébastien of Luxembourg is the youngest son of Grand Duke Henri and Grand Duchess Maria Teresa - and therefore doesn't make the headlines as much as his older brother and heir to the throne Prince Guillaume The 30-year-old, who was born on 16 April 1992 at the Maternité Grande-Duchesse Charlotte, went to Sandhurst from 2016 to 2017, following in the footsteps of his father and his eldest brother The prince was sworn in as an officer of the Luxembourgish Army in September 2017 - but since then, Sébastien has commanded a platoon of the Irish Guards His grandfather Grand Duke Jean served in the regiment of the British Army during World War II. HEINRICH DONATUS, HEREDITARY PRINCE OF SCHAUMBURG-LIPPE Prince Donatus, 28, is a descendant of the Schaumburg-Lippe royals, who ruled the German state until the abolition of the country's monarchies after the First World War He shares his good lucks with his glamorous mother Princess Marie-Louise of Sayn-Wittgenstein-Berleburg, known as Lilly Wittegenstein The pair, pictured together, recently undertook an ultramarathon together, walking nearly 100 miles through mountainous terrain, to raise funds for a relief project in the Philippines Heinrich Donatus volunteered in March with non-profit Interhelp to give medical support to Ukrainians arriving in Poland after Russia invaded their home country Heinrich documented his journey to the Ukrainian border on Twitter and Instagram, showing the supplies that the charity had delivered.