West Ham academy manager Terry Westley
Holland arrived at the London Stadium from Everton in January and has impressed with three goals already for the Hammers' Under-23s.
Westley claims to have tracked the 18-year-old winger since watching him play for England three years ago, and says the Toffees' wealth of options have caused him to go under the radar, as was the case with Martin Samuelson at Manchester City.
And though Samuelson was loaned to Peterborough United just five months after his arrival in east London, with further spells at Blackburn Rovers and Posh following on this season, Westley is keen to keep Holland - a player he describes as a 'late developer' - under his watchful eye for now.
West Ham's Martin Samuelson in action
"I don't think Nathan's ready for that [a loan move] yet," he told Talksport on Thursday. "He's only just come in to our club. It's a completely different move for the boy, to move from Manchester and Everton where he's from to come into London.
"We want to keep him for a little while, we've seen a completely different boy, in terms of he's enjoying himself, the confidence of playing in the main stadium the other day, the confidence of going over ans joining in with Slaven [Bilic]'s eleven, he's had a very very good two months.
England's Nathan Holland celebrates
"So at the moment we'll keep the boy, we'll probably keep him until next January when the window reopens for another loan."
As well as Samuelson, West Ham currently have a number of young talents on loan at Football League clubs, including Reece Oxford [Wigan Athletic], Toni Martinez [Oxford United], and Reece Burke and Marcus Browne [both Wigan Athletic].
How good can Holland be for West Ham United?