Isa 11:10 And in that day there shall be a root of Jesse, which shall stand for an ensign of the people; to it shall the Gentiles seek: and his rest shall be glorious.

Rom 15:12 And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust.

Jesse is an anglicanized form of Yishay/Isai meaning my substance. Yesh being, existence, essence, substance. Yud as a suffix indicates first person singular possessive; av (father) becomes avi (my father).  So I do not agree with the general translation as “I possess”; “wealthy” only when used in reference to the underlying Hebrew root.  

Rev 5:5 And one of the elders saith unto me, Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof.

Rev 22:16 I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, [and] the bright and morning star.