This Prince William and Kate Middleton foto contains
fedora, vilten hoed, homburg, cowboyhoed, trilby, fedora met vilten hoed, stetson, schipper, leghorn, panama, hoed, zeeman, skimmer, strooien hoed, livorno, panama hoed, matroos, and stro hoed.
There might also be
vierdeukenhoed and campagne hoed.