How to create a character family tree

So....at the moment, I am working on the background of my character. More specifically, her family tree. I have been using a free online tree mapper; however, I find myself losing at how specific I should make it. I know for sure that I want her family to go back 3000 years (to ancient times) and that the matron and patron of her clan at that time are important, but besides their children and my OC's mother, grandparents, immediate aunts/uncles no one else is important.
Do you guys have a rule of thumb at how many family members should be developed for a good background, or is it just a 'develop as you go' kind of thing?

 

To be honest I see the glory and appeal but it seems like an unnecessary time dump. Even in my wildest fantasy stories, I do not flesh out their family trees very far. If her family goes back 3000 years, simply imply it somehow and only bother to connect those who are actually important. I used to spend a lot of time on stuff like this when I wrote stories in high school and I never finished anything because I never started the story itself, just kept concerning myself with family trees, maps, charts... Best I can say is to keep it quick and simple.

 

Gotcha. Thanks for the advice!

 

To be honest, I kinda need a family-tree generator to map out my character's own families as well. It would be very helpful if I could find an online version of a family tree for multiple generations

 

As many as are necessary for the story.

If the character's great aunt twice removed is not important for the story, I don't bother. If it's enough to know they're descended from Great King Mugglesworth III, and they're the son of Duke Boojam, that's all I'll bother with.

 

There is this website that I have been using for the past couple of months called "Family Echo". You can create multiple family trees on the same account, and it doesn't link up to any actual family trees, which is good for me.

https://www.familyecho.com

 

And it's free.

 

Oh, and my progress usually involves:
- How many siblings could they have?
- How old was the parent when they had their first child.
- With siblings, I figure out how many siblings they have and use a coin or dice to predict their sex. With the coin, heads are usually girls, and boys are tails, and I would flip the coin at least 3 times without looking, and on the third go, I would look and see what they land on. The dice is the same progress, but even numbers are girls, and odd numbers are boys.