Not much to go on. How old does it look?
The general type and English fantasy name sound like one of the .25 FN/Colt Vest Pocket copies that the Basque gun makers around Eibar switched to after the WW I Ruby contracts ran out, in the 1920s. Same time period when they produced S&W and Colt revolver copies.
PS: Does it look like this one? Then I’d be right.
Spanish "Protector" .25 ACP semi-auto pistol. | Quinn's Auction Galleries