Was lincolns secretarys name Kennedy and can you get this answer from the history channel-website?

No.

President Lincoln had 2 Private Secretaries, while in the White House. John Nicolay, and his Assistant Private Secretary was John Hay.

President Kennedy's Private Secretary's name was Evelyn Norton Lincoln.

I am not sure if this information is available on the History Channel Website; very likely, it is.

I have included a related linked website, with 2 links about both of his Secretaries, which is as reliable as the History Channel's website, and a link to the Wikipedia article on Evelyn Lincoln.