Harold Macmillan was Irish.
Vladimir Nikolayevich Ipatieff -LRB- also Ipatiev ; Владимир Николаевич Ипатьев -RRB- -LRB- November 21 , 1867 -LRB- November 9 OS -RRB- -- November 29 , 1952 -RRB- was a Russian and American chemist .. chemist. chemist. His most important contributions are in the field of petroleum chemistry .. petroleum. petroleum