DNA of prince Gleb Svyatoslavovich from the grave in Chernihiv cathedral was tested, he was I2a-Din not N1c:
Gleb Svyatoslavovich in this publication about Viking Age DNA is the sample VK542:
https://www.biorxiv.org/content/10.1101/703405v1
If I'm not mistaken, Gleb Svyatoslavovich was directly descended from Rurik himself.
And since he was I2a-Din, it makes the theory about I2a-Din Rurik more probable:
https://www.eupedia.com/forum/thread...l=1#post552727
In terms of autosomal DNA, Gleb Svyatoslavovich (VK542) was ca. 71% Slavic and 25% South Euro (Table S6):
https://www.biorxiv.org/content/bior...?download=true
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Another Rurikid prince tested in this publication was Izyaslav Ingvarovich - his haplogroup was R1a-L1029.
In terms of autosomal DNA, Izyaslav Ingvarovich (buried in Lutsk) - sample VK541 - was over 95% Slavic.