Like Jewish ancestry?
Not at all.
Please read this.
http://freerepublic.com/focus/religion/3486544/posts?page=32#32
Also, read the book of Romans written by Saul of Tarsus, in his own words, “a Hebrew of the Hebrews”, taught at the feet of Gamelial, a persecutor of the Christians, who met Jesus on the way to Damascus.
You can read that story in the Book of Acts chapter 9.
Also, if you were ever curious about why the pre-communist Ethiopia was Christian but had the Magen David as their national emblem, read the story of the Ethiopian Eunuch in Acts chapter 8 starting at verse 26.