An example is the attack by Peter Hofschröer, a defender of Siborne, on a minor point in Knoop's book in the article linked in the External Links.
Willem de Kooning | Willem Dafoe | Jan van Eyck | Jan Matejko Academy of Fine Arts | Jan Hammer | Jan Peerce | Jan Hus | Jan Mayen | Willem Blaeu | Jan Guillou | Jan Smuts | Jan Fabre | Jan Morris | Jan Matejko | Jan Garbarek | Ignacy Jan Paderewski | Willem Janszoon | Jan van Riebeeck | Jan Troell | Willem Mengelberg | Jan Tinbergen | Jan Neruda | Jan-Michael Vincent | Jan Kochanowski | Jan Brewer | Jan Bechtum | Willem Roggeman | Jan Zamoyski | Jan Ullrich | Jan Peter Balkenende |