Pochettino was initially hesitant to allow Onomah at the centre of the field last season and this loan move to Villa may allow the manager to gauge the players abilities as he will likely be playing for the Villains on a regular basis.
An under-20 World Cup victor with England this summer, the youngster becomes Villa's sixth signing of the summer, following the likes of John Terry, Christopher Samba and Glenn Whelan and could play a vital role in the club's push for promotion to the Premier League.
He made 12 senior appearances for Spurs in 2016/17, including a Champions League debut off the bench away at Bayer Leverkusen in October 2016.
Onomah is Bruce's sixth signing, following Johnstone, John Terry, Chris Samba, Glenn Whelan and Ahmed Elmohamady through the door.
With 21-year-old Jack Grealish expected to be out of action for the first few months of the season due to kidney damage, Onomah could be asked to fill in for the winger, having regularly played out wide under Pochettino.
Aston Villa fans: What do you think Josh Onomah will bring to your side?
However, the north London side are willing to send him out on loan ahead of the new campaign, with Steve Bruce winning the chase for the exciting midfielder. Let us know your thoughts.