He had a friendship/correspondence/mild flirtation with his first cousin Princess Maud of Wales and their first cousin Nicholas of Greece. Due to the shortage of names Russian Georgie was "Musie" and Greek Nicky was "Mr. Toad", Maud being "Stumpy".
Here they are holding hands.
https://www.rct.uk/collection/search...edensborg-1883 Even the RCT makes it very difficult to determine whether there is a picture of the three of them, however.
Ironically, it's to George she wrote referring to yet another cousin, Carl of Denmark (the kid in the hat sitting in front of them) quite frankly as "daft" — he's the one she ended up marrying.
Also, the thread title is incorrect; George was born in 1871, not 1872.