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Those Koemans, eh. They’re like buses.

You wait ages for one to arrive then two come along at once.

As Ronald Koeman edges nearer to being unveiled as Everton ’s new manager, the details of his backroom staff are beginning to emerge.

And key to the proposed new coaching line-up under the Dutchman will be his brother Erwin, who has been an integral part of Southampton’s success during the past two years.

Given the pair were prominent Holland international team-mates during the 1980s – both started the Euro 1988 final win over the Soviet Union – their club playing careers saw them united only for a brief spell at Eredivisie side Groningen.

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And despite both subsequently enjoying lengthy stints in the dugout, it was only when Ronald took over as Southampton boss two years ago that they were worked together for the first time.

From strong footballing stock – their late father Martin was also a Dutch international – the 54-year-old Erwin is the elder of the two brothers by two years.

He spent much of his playing days at PSV Eindhoven during two spells, winning the Dutch title twice, and also appeared for Mechelen during their golden period in the late 1980s when, in the space of two years, they won the Belgian Cup, Belgian league, European Cup Winners’ Cup and UEFA Super Cup.

After hanging up his boots, Erwin was both youth coach and assistant coach at PSV before taking over at RKS Waalwijk and then Feyenoord (two wins for Ronald, one for Erwin and one draw).

He was in charge of the Hungary national team for two years and, after a brief spell at Utrecht, he returned to Waalwijk where he locked horns with brother Ronald, who was then manager of Feyenoord.

The move to Southampton followed.

“We once said we would be good to work together, but my father also said it would be fantastic if we could be a duo,” says Erwin. “Unfortunately he won’t experience it but I am sure he would really like it.

“But right up until his death (in 2013), he was still involved in football at FC Groningen in the youth academy.”

Everton fans expecting any sibling rivalry on the touchline may be disappointed, however.

“We do not have to speak to each other about football,” says Erwin. “We look at each other and we know what we want to do – or not.”

So, will telepathy be the secret weapon behind an Everton revival next season?