When counting an author's citations in Thomson's Web of Science (or Science Citation Index), it is instructive to search for Treatise on Natural Philosophy by Baron (Lord) Kelvin of Largs, William Thomson, which appears variously under:
Kelvin; Kelvin L; Kelvin PGL; Kelvin W; Kelvin WT; Thompson KW; Thompson W; Thomson; Thomson EJ; Thomson K; Thomson L; Thomson W; Thomson WS; and Thomson WT.
Fortunately, he did not change his name each time he married.