Positive talks with his brother Luuk, who spent last season with the Toon, also helped push the deal along after the striker gave Pardew a glowing reference.
De Jong said: “I spoke to him (Alan Pardew) once and Luuk also told me all about him, plus he spoke to our manager a couple of times.
“I have a feeling he is an honest trainer and I hope we have a good couple of years.”
But he was positive when asked by his brother about a move to Newcastle.
He told the Evening Chronicle: “Luuk has said that Newcastle is a great club, a great atmosphere in a great stadium.
“He said it is a big club in the world and he hopes that one day he comes back, maybe with me, so we will see.”
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