| Constantine II of Greece Close Associate | father | - | - | |
| Chrysí Vardinogiánni Close Associate | spouse | | - | |
| Pavlos, Crown Prince of Greece Politician | sibling · younger brother | - | - | |
| Margareta of Romania Close Associate | godparent · second cousin | - | - | |
| Princess Tatiana Blatnik Close Associate | spouse | | | |
| Prince Philippos of Greece and Denmark Politician | sibling | - | - | |
| Queen Anne-Marie of Greece Close Associate | mother | - | - | |
| Alexander, Crown Prince of Serbia Politician | godparent · second cousin | - | - | |
| Princess Irene of Greece and Denmark Close Associate | godparent · paternal aunt | - | - | |
| Princess Theodora of Greece and Denmark Politician | elder brother · sibling | - | - | |
| Princess Alexia of Greece and Denmark Politician | sibling · younger brother | - | - | |