Some of them will possibly like you more than the average citizen, but it’s worth pointing out that culturally, you wouldn’t be half-and-half, because the egregore bond forces you to be either Dawn or Wintermark.
On the other hand, I don’t see them having any problem with you unless you do something to make them unhappy IC like suggesting their armies are terrible.
The only thing I’d look at personally are the names - Celia and Viola both sound very Dawnish, but Dawnish usually take their House (if they’re noble) or their profession (if they’re yeofolk) after their given name.
Your names for your character and your character’s father give me slight pause for thought - they don’t strike me as inherently Wintermark. Saulos personally makes me think of Highguard (as a biblical name), whilst Adrian I can’t directly place. Wintermark names usually draw from Saxon and Finnish, and then take a second name from a parent, their hall or an epithet.
For example, you and your father could be [someone]-ling (of [someone’s] hall), or you could be Adriansen/Celiasdottir, or you could have an epithet ([name] the Vengeful, Fierce [name]).
I wouldn’t say it’s essential to change them, but I think it has the capacity to both make you more iconic and recognisable on the field, and give you and your parents more of a characterisation. In Empire, you can often learn a lot about a character just from their full name!
Firstly: welcome! It’s great to have new players, and living close to the current site is a great bonus for you.
I’ve never played in either nation - my PC was in the Brass Coast - but I’ll say (as other people have) that Wintermark is easily the largest nation, and seems to attract the greatest number of new players. That’s not to say you can’t be in it, but it will likely give you a very different feel for the game.
To speak for Navarr: They are the remnants of a lost Empire, and though they have their own territory, they are something of the lifeblood of the Empire, with many of them travelling all nations to keep a deadly threat at bay. The stereotypical Navarr is a skirmisher sneaking through the woods to stab their enemy in the back. They see life as a Great Dance where everyone has a role to play.
Wintermark, by contrast, is interesting for almost being three nations in one, and draws strength from each component - the brave Steinr, cunning Suaq and wise Kallavesi. The stereotypical Winterfolk charges into battle with a clear head, swinging a blade they made themselves - they see life as a personal journey along one’s skein, the path woven as one makes significant choices in one’s life.