Does this tradition actually exist in Somali areas ?

[Starscream]

This sounds like something areas with rulers do

that being said.... don't they still have Boqors in a lot of Darood tribes?

For the most part no
Warsangeli(same as mj)
,mj(he holds no real power mj politician hold all power)
,ogaden(not recognise by all ogaden)
Merahan doesn't have one at all
dhulos have 13(some are closer to the the above mentioned while others hold alot of power this last group numbers probably less than 3)

 

[diana amna]

There is a tradition that a widowed woman marry the brother of her deceased husband, so then her kids with the dead one & the kids with the new one become half siblings/cousins. It is still practised in some places.

Yup still in practice