Netherlands
Ko Janssens
Ko Janssens was a boxer from Netherlands, born Dec 20, 1889.
Also: كو جانسينز · Jacobus Cornelius "Ko" Janssens
BornDec 20, 1889
DiedAug 21, 1970
Country🇳🇱 Netherlands
Born inRotterdam, Netherlands
Boxerbook ratingnot rated yetHow it works ›
Confirmed bouts—
Career record
Record
No record compiled yet
The record
No bouts recorded yet.
Amateur career
1920 Summer Olympics – Men's lightweight
Round of 16LFrank Cassidy 🇺🇸
1 amateur bout at major tournaments, from the tournament articles on English Wikipedia (CC BY-SA). Not part of the professional record.
Ratings now
Not in any current ranking.
World titles
No world title reigns recorded.
Sources
Boxerbook ID 16543 · permanent link boxerbook.com/id/16543. Wikidata (CC0), English Wikipedia (CC BY-SA). Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.