Surgat is a minor demon mentioned in the Grimoire of Pope Honorius III, the Grimorium Verum , and The Book of Ceremonial Magic by Arthur Edward Waite(1913).

He is listed as Surgat who opens all locks.

Invocation

For Sunday, to Surgat (otherwise Aquiel )...

This experience is [best] performed at night from eleven to one o'clock. He will demand a hair of your head, but give him one of a fox, and see that he takes it. His office is to discover and transport all treasures and perform anything that you may will.
Write in his circle: TETRAGRAMMATON, TETRAGRAMMATON, TETRAGRAMMATON. ISMAEL, ADONAY, IHUA. And in a second circle: Come, SURGAT! Come, SURGAT! Come, SURGAT!

Conjuration:

I conjure thee, O SURGAT, by all the names which are written in this book, to present thyself here before me, promptly and without delay, being ready to obey me in all things, or, failing this, to despatch me a Spirit with a stone which shall make me invisible to every one whensoever I carry it! And I conjure thee to be submitted in thine own person, or in the person of him or of those whom thou shall send me, to do and accomplish my will and all that I shall command, without harm to me or to any one, so soon as I make known my intent.

Surgat in Fiction

The name Surgat is mentioned in:

• Grail (1981) - Harlan Ellison,
  
• Death from a Top Hat (1938) - Clayton Rawson,
  
• Doomed Lensmen (1967) - Lee Gold

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Surgat also appears to be Latin for arise.