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Jacobus Kapteyn was born on January 19, 1851 and died on June 18, 1922. Jacobus Kapteyn would have been 71 years old at the time of death or 161 years old today.
Depends where it is in the sentence. "The birthday girl and I are going to eat cake." "Give the cake to the birthday girl and me." If it helps with compound subjects or nouns like this, imagine...