documentclass[a4paper,12pt]{extreport}
usepackage{fontspec}
usepackage{polyglossia}
setdefaultlanguage{english}
setmainfont{CMU Serif}
begin{document}
The word to the reader:
"In this autobiography, the name of Dr. Smith is mentioned on pages xyz `pageref{Smith}`"
newpage
Bla... John Smithlabel{Smith}
newpage
Bla... Johnlabel{Smith}
newpage
Ba...Dr. J. Smithlabel{Smith}
end{document}