Dolph Lundgren's daughter, Ida Lundgren, got a restraining order against her ex-boyfriend after he allegedly threatened her family ... TMZ has learned.

According to legal docs obtained by TMZ ... a judge ordered Ida's ex, Jack Eaton-Morris, to live at least 100 yards away from Ida, Dolph, and other family members.  

Ida claims on June 1, 2022, Jack took her phone and her passport to prevent her from leaving a London hotel, and also grabbed her face.

She says law enforcement officials were called, but Jack had fled -- she claims he'd driven off drunk.

And, according to Ida, Jack's flown off the manage like this at the least 10 instances before ... as soon as even threatening to explode her mom's car, and once more he threatened to kill himself.

The judge granted her a temporary restraining order, and there will be a hearing on June 30 ... where he can tell his side of the story.

BTW, Ida noted she has now broken things off with Jack, but he refuses to accept it.  

DOLPH LUNDGREN Daughter Gets Restraining Order Against Ex-BF–

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