Football referees
José María Aranda Delgado
José Caucelo Sace
José Antonio Fernández Rodríguez
José Joaquín Gallego Gambín
José Luis González González
José Luis Hoyo Mateus
Juan Peña Varela
Juan Manuel Ruiz Aguilera
Julian Bergmann
Julio Fermín Leo Ollo
Julio Mena Gimeno
Kevin Parry
Karim Abed
Kirill Abrosimov
Karen Abt
Kun Ai
Komlanvi Aklassou
Khaled Al Ghandour
Khalid Al Juhani
Khamis Mohamed Al Kuwari
Khamis Al Marri
Khalid Ali Mohamed Ali Mahmoud Al Mulla
Khalaf Zaid Al Shammari
Khalid Marhoun Sulaiman Al Shaqsi
Khaled Al Teris
Khalid Alahmari
Konrad Aluszyk
K. Ams
Konstantinos Andrianos
Kirill Apanovich
Kleber Andres Aroca Miranda
Karol Arys
Kyriakos Athanasiou
Kouassi Attidgbe
Kyle Averill
Konstantin Averjanov
Koray Aydin
Kevin Javier Báez Villalba
Konstantinos Balatsoukas
Ki-Yeol Bang
Kevin Barbin
Kreshnik Barjamaj
Kęstutis Bartuškevičius
Kamran Bayramov
Kavitesh Behari
Kevin Behrens
Kutluhan Bilgiç
Kevin Blom
Kevin Bonacina
Kristof Borms