Otto (1278 – Horstmar, October 29, 1310) was

Count of Cleves The Duchy of Cleves (german: Herzogtum Kleve; nl, Hertogdom Kleef) was a State of the Holy Roman Empire which emerged from the medieval . It was situated in the northern Rhineland on both sides of the Lower Rhine, around its capital Cleves and ...

''Niederrheins Urkundenbuch'', Band III, 96 from 1305 through 1310. Otto was the eldest son of

Dietrich VII, Count of Cleves Dietrich VII (1256–1305) was Count of Cleves from 1275 through 1305. He was the son of Dietrich VI, Count of Cleves and his wife Aleidis von Heinsberg. The County of Cleves (german: Grafschaft Kleve; nl, Graafschap Kleef) was a comital p ...

(1256–1305) and his first wife Margaret of Guelders. His first marriage was to Adelheid van der Marck, daughter of

Engelbert I, Count of the Mark Engelbert I, Count of the Mark (died 16 November 1277 at Castle of Bredevoort) was a German nobleman. He was the ruling Count of the Mark from 1249 until his death. Life He succeeded his father, Adolf I as the ruling count in 1249. His bro ...

. Later he married Mechteld von Virneburg, a niece of

Heinrich II of Virneburg Count Heinrich II of Virneburg (german: Graf Heinrich II. von Virneburg) (1244 or 1246 – 5 January 1332) was Archbishop of Cologne from 1304 to his death in 1332. Life Heinrich was the sixth son of Count Heinrich of Virneburg (??1238-1290) and ...

. They had one daughter

Irmgard of Cleves Irmgard of Cleves (also known as ''Irmengard von Kleve'') was the wife of John IV, Lord of Arkel. Born in 1307, she was the only daughter of Otto, Count of Cleves and his wife, Mechteld von Virneburg. Her father, Count Otto died shortly after her b ...

, who married Adolph II of the Marck and later John IV of Arkel. When he died in 1310 he was succeeded by his half-brother Dietrich VIII.

References

{{Authority control Counts of Cleves 1310 deaths