Taoiseach Enda Kenny has described Mr Lenihan as a decent man and exemplary public servant.
Speaking at a meeting of the North South Ministerial Council in Farmleigh, Dublin, Mr Kenny said: “Brian Lenihan was exemplary in the carrying out of his public duties. He continued a long line of representation for Ireland in public life by both his father (Brian) and grandfather (Patrick) and his family in general.
“He exemplified a great sense of humanity in the public representation he gave. I’d like to say I’ve known Brian Lenihan for many years and regard him as a friend in politics.”
Mr Kenny said that even though he differed politically with Mr Lenihan he was always available to discuss political matters.
“He exemplified wonderful courage of an enormous extent in speaking publicly about the illness that he challenged so courageously and about the difficulties he was encountering personally in dealing with that illness and in carrying out his public duties in the most challenging circumstances for any minister for finance.”