Eirik the Red left Iceland around 985 A.D. to colonize Greenland. That colony survived for centuries and there are the Vinland Sagas that tell of the early days: Eirik the Red's Saga and The Saga of the Greenlanders. Eirik had a daughter, who was likely a half sister to Leif the Lucky. The sagas do not agree on this. She rated more than a little mentioning in the sagas because she was such a wild thing. Her name was Freydis.
There was a sister in law Gudrid, who is also mentioned at length. She gave birth to the first European born in the New World, Snorri Thorfinsson, and became a nun. This balances the account of Freydis. There are a few other women mentioned in the sagas because they sailed with the men to explore Vinland.
Freydis headed her own expedition to Newfoundland and asked her brother Leif if she could have the houses he built there. He told her that she could borrow them only. Another group went on the expedition in their own ship. For whatever reason, Freydis would not share the houses with them so they had to build their own. Then she told her husband that the leader of the other group had insulted her so that her husband and their men need take vengeance. So they attacked the other group and killed them all for no reason. No reason was ever given for why Freydis wanted them dead. Greed, perhaps? There were five women with the other group whom Freydis' men refused to kill so Freydis killed all five personally with an ax.
On another trip to Vinland, the group was attacked by natives and some of the men were killed and they were making a rapid retreat. Freydis was pregnant so she could not move fast and she could not keep up with the fleeing men. So she picked up a sword and decided to fight. She faced the natives alone by baring her breasts and slapping the sword against them. This startled the natives and they decided to run away rather than attack her.
The sagas do not tell much more of her. She was married to a man called Thorvard. "She was a domineering woman, but Thorvard was a man of no consequence. She had been married to him mainly for his money."
The history books that I read when I was a child never mentioned her. She commanded a few expeditions to the New World but we only ever heard of her brother. Mind you, should those two stories be included in a history book written for children?
I should mention that I was using the Penguin Deluxe Edition of The Sagas of the Icelanders with Keneva Kunz's translations of the two quoted sagas.