The youngster has signed for the rest of the season in a short term loan deal.
Meanwhile, they have also secured Everton midfielder Charlie Whitaker on a six-month contract.
"With Lucas likely to miss the remainder of the season and Lewis facing a prolonged spell on the sidelines, it was important for us to add another defender to the squad to ensure we have adequate depth for the run-in," County's director Richard Montague told the club's website.
"Charlie is another young, high-potential player who we've been monitoring for some time. While we think he's best suited to central attacking areas, he's versatile and comfortable playing out wide.
He added: "Charlie has demonstrated a genuine goal threat throughout his youth career and has the technical ability, pace and tenacity to be a real handful."