|Spouse||Princess Rhaena Targaryen|
The World of Ice & Fire (appendix)|
Fire & Blood (mentioned)
Garmund was the third son of Lord Ormund Hightower and his first wife, who died in childbed at some point. He had two elder brothers, Lyonel and Martyn, and a sister, Bethany. During the Dance of the Dragons, his father married again to Samantha Tarly, known as "Lady Sam," who would later marry his brother Lyonel.
Garmund served as a page to House Tyrell at Highgarden during the Dance. Archmaester Gyldayn believes that Lord Lyonel accepted Lord Corlys Velaryon's peace terms because of the end to Tyrell neutrality when Aegon III became king, as Garmund could have lost his life for the Hightowers defying the peace terms.