Wikipedia
Jondalar of the Zelandonii is the male main character of Jean Auel's Earth's Children speculative historical fiction series set in the Late Stone Age of Europe. He has long pale blond hair, vivid blue eyes, is six feet six inches tall, and is described as extremely handsome, skillful in many ways with a tendency to pull his hair back in a pony-tail.
Introduced early in the second novel of the series as a "co-star" of the book The Valley of Horses, he and his brother Thonolan are on the long Journey to see the end of the Great Mother River Danube. The Journey had been Thonolan's idea, and Jondalar had come along to keep an eye on his brother. Their adventures run as a parallel period of time to Ayla's years in her Valley. The stories alternate back and forth until the two main characters finally meet, when Jondalar and Thonolan are attacked by a cave lion. Thonolan is killed and Jondalar is seriously hurt. Ayla takes Jondalar to her cave and treats his wounds.