Honorary Membership was limited to 10 from 1890-1900, and to 15 from 1901 onwards. Corresponding Membership was a lesser class of Honoris causa membership in the early years. A few honorary members, such as Barnard, were first made corresponding members for a short time before being recommissioned as honorary members.
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|Underhill, Dr. Anne||Canada||1996||2002|
|Unsöld, Dr. Albrecht||Germany||1956||1995|
|van Biesbroeck, Dr. Georges-Achille||Belgium/USA||1962||1974|
|van de Hulst, Prof. Hendrik||Netherlands||1968||2000|
|Vogel, Dr. Hermann C.||Germany||1894||1907|
|von Struvé, Dr. Otto Wilhelm||Russia||1894||1899|
|Williams, Mr. Arthur Stanley||United Kingdom||1909||1938|
|Winder, Mr. Daniel K.||USA/Canada||1890||1891|
|Wolfer, Prof. Alfred||Switzerland||1904||1931|
|Woolley, Dr. Richard v.d.R.||United Kingdom/South Africa||1961||1986|