Jean IV of Brittany (1339-1399)
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Name variants
![English](/Images/flags/small/gb.png)
Jean III of Brittany
![English](/Images/flags/small/gb.png)
Jean III of Montfort
![English](/Images/flags/small/gb.png)
Jean IV of Brittany
![English](/Images/flags/small/gb.png)
Jean IV of Montfort
![English](/Images/flags/small/gb.png)
John III of Brittany
![English](/Images/flags/small/gb.png)
John III of Montfort
![English](/Images/flags/small/gb.png)
John IV of Brittany
![English](/Images/flags/small/gb.png)
John IV of Montfort
![International format](/Images/flags/small/un.png)
Jean III de Bretagne
![International format](/Images/flags/small/un.png)
Jean III de Montfort
![International format](/Images/flags/small/un.png)
Jean IV de Bretagne
![International format](/Images/flags/small/un.png)
Jean IV de Montfort
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