About the only thing anyone can agree on about Umila is that if she existed she was Rurik's mother.
Rurik's birth date seems to be commonly quoted as c817 which clashes with the current DOB of Umila at c820 so i am going to change Umila's DOB to c800 which will also require changing her siblings, her father, his father, etc.
However, i will not make changes to her husbands DOB, primarily because i dont think any of them belong on the tree... one document i have read suggested to me that rather than his mother Umila may have been Rurik's wife?
Further, i suspect her current husband Ingvar may actually be a wrongly located duplicate for her grandson, Igor I.