Atlas Odyssey

Atlas parents were lost 'exploring' in the Everfree for twelve months. While his mother was pregnant. Eight months in, they wanted out because Atlas was close to being born. It took them a further four months to get out. So Atlas was born in the Everfree and spent the first four months of his life in it. When him and his family made it to Ponyville, his parents settled down in the town and he lived a fairly normal life. As normal as living with two ex-adventurers can be.

They had named him Atlas Odyssey because they thought he would be a great adventurer one day, just like them. To their surprise, his cutie mark ended up being a map with lines and an red X on it. They were fine with him being gay, that wasn't a problem, but being a map maker? That shocked them to the point of fainting! When Atlas had consoled his parents and explained things, he took off with his saddle bags and went on an adventure to map out areas that haven't been mapped before. Equestria is a giant place, after all.

Atlas is calm under pressure. He is collected and can think things through. He does things in a specific order and gets OCD about how his maps are organised and how he goes about making them.