Optimist World Championships

Officially recognised world championships are sanctioned by World Sailing formerly the International Sailing Federation. Sailing as a sport has probably the most number of World Championship title with well over 100 titles awarded many to two or more people awarded annually.

The number of titles is due to the diversity of equipment. Sanction World Championships fall into the following categories:

All class that are member of the World Sailing may hold class world championships provided they meet the federation participation requirements. Class often award multiple World Championships based on criteria such a gender, age and disciple

This is not a complete list but the following are known to have won eight or more World Championship titles.

This is an incomplete list of world championship titles that have been awarded to winner of individual events. (It does not include title awarded to sub categories with an event.)

...
Wikipedia