How to stop recruited prisoners running away

Do I have to quickly increase morale by say holding a feast or is it about my renown?

Neither will stop them from deserting in my experience. Garrison them overnight.

The best way is to stash recruited prisoners into your refuge or settlements you own. Once your morale is back up you can go and fetch them. You can raise morale from some of the following:

-Happy widow
-Priest
-Buy a barrel of Ale for the men at the tavern
-Win battles and leave all of the loot for them
-Have a good assortment of food

There are a few other ways, but that should be enough to get you going in the right direction.
 

Okay, cheers 

Are all the companions giving to you during the story or are some able to be found in meal halls like in native?

No, there's plenty more than those you meet over the course of the storyline. Some you find in mead halls, some in special locations.

Cadwallen Brac said:

Are all the companions giving to you during the story or are some able to be found in meal halls like in native?

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