The 18-year-old has been part of Neil MacFarlane’s squad since October last year having joined for a temporary period from the Icelandic side.
The youngster made 23 appearances for the young Bees and found the net on five occasions during his time in West London. Valgeir featured in a number of different positions for the side and has contributed a great deal this season in impressive wins over the likes of Aldershot Town and Maidenhead United, as well as Under-23 sides from Chelsea and Arsenal.
Valgeir made an instant impression at the Club as he netted twice on his debut in the 6-2 win over Hendon FC in the London Senior Cup.
Discussing the impact that Valgeir has had on the side, Brentford B Head Coach Neil MacFarlane said: “We couldn’t have asked any more of Valgeir. From the moment he arrived with us he has given everything on an individual basis and from a team perspective. He’s an amazing boy who has been unbelievable for the culture that we have at our Club, and he’s a player who is always looking to improve himself by doing extras.
“I know that Valgeir has enjoyed his time with Brentford, and we’ve certainly enjoyed working with him and helping him to improve. I have no doubts that Valgeir will have a good career because he has the drive within himself to keep on improving every single day. He’s going to return to his parent club, and we wish him all the best ahead of their new season.”
Valgeir departs Brentford with the best wishes of everyone at the Football Club.