Glaedir was born in the year 2995 TA to a woodsman tribe whom claim to be descended from the Edainic peoples who fled to the Forest during the War of the Elves and Sauron. Raised to show his worth, or leave, he showed early signs of compassion in his ways. Some in the tribe saw this as a weakness; however he made up for this by showing true talent as a smith. For some time he was very happy with the tribe, but his wanderlust began to grow.

The threat to the east was not unknown to the tribe, however they were a folk that preferred to keep to themselves. Their Patriarch however, was a man who sought gloury, and recognition for his tribe. As such he decided he would send some of his sons as emissaries to the kingdoms of men. He was however quite conservative; some may say his contribution was not for the good of all, but merely a way for him to say that he tried if he were ever questioned about the idle play of his kinfolk. As such he did not exactly intend to send any of his best, in fact, he sent many of his lesser sons to the kingdoms of men.

Glaedir was not initially sent, but the Eorlingas were unhappy with their gift, and came to claim another, taking Glaedir.

Glaedir was trained with the Horse lords of the Eorlingas until he was ready to join their ranks. His connection with Poppy, his horse, proved to be very fruitful as their seeming understanding of one another's needs improved their speed and effectiveness in combat. King Theoden eventually Knighted Glaedir and named him an Honorary son of the Eorlingas.