Sir Thomas Grosvenor
... that when Sir Thomas Grosvenor became baronet, he was aged eight, and when he married at the age of 21, his wife was aged 12?
... that when <b id="mwEEU"><a href="./Sir_Thomas_Grosvenor,_3rd_Baronet" id="mwEEY" rel="mw:WikiLink" title="Sir Thomas Grosvenor, 3rd Baronet">Sir Thomas Grosvenor</a></b> <i id="mwEEc">(pictured)</i> became <a href="./Baronet" id="mwEEg" rel="mw:WikiLink" title="Baronet">baronet</a>, he was aged eight, and when he married at the age of 21, his wife was aged 12?