Children/ Teenager book. Set in a Wintery/ Nordic/ snowy realm. Two MCs: one female, one male. Read around 2016-2020. Spoiler.

[John]

Here I have more info but I am not sure if it isn't spoilers.(view spoiler)[The female mc was a daughter of a general I am pretty sure but then she ended up in the Snowy country. She got mentored by an older woman. I remember a pretty extensive joke about 2 brothers told by the woman to the mc, one named ,,Nobody" and the other I am not sure. it was about the ,,Nobody" one being shot by an arrow and the other coming to a tavern to request help. There had also been some crossbow training in the book. (hide spoiler)] Thanks for potential help.