He was the son of John I of Egmond and his wife, Guida of IJsselstein.

In Egmond aan den Hoef he renovated the chapel at the ancestral castle, surrounded the castle with a moat, and had a canal dug to connect it with Alkmaar.

He was commander of the Dutch troops who were tasked with stabilizing Frisia.

Arnold died at the age of 72 and was buried in the monastery at IJsselstein.

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