Ichigo related to the Shiba Clan or someone else from SS?

[s2mangas2]

well is it possible that ichigo is from the shiba clan.
since ishin is a shinigami, and i cant forget the reaction captian ukitake had on his face
when he first saw ichigo and thought he resembled shiba kaien, and sui fong mentions something about the
shiba clan being destroyed when they were a noble family in soul society.
could sui fongs statements be becuase of ishinsactions either in helping urahara or leaving soul society or
whatever he did in the past, and finally i recall what byakuya mentioned about whyichigo has so much rieatsu even
without being nobilty.
what do you guys think.