Alexander Nicholson may refer to:
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Alexander Malcolm Nicholson (1900–1991), Canadian clergyman, farmer and politician
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Alexander John Nicholson (1895–1969), Irish-Australian entomologist
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Alexander M. Nicholson, American scientist
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Alexander Nicholson (police officer) (1863–1928), Australian police officer
See also
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Alex Nicholson (disambiguation)
{{hndis, Nicholson, Alexander