Rahmah ibn Jabir ibn Adhbi al-Jalhami (Arabic: رحمة بن جابر بن عذبي الجلهمي; c. 1760–1826) was an Arab ruler in the Persian Gulf region and was described by his contemporary, the English traveler and author, James Silk Buckingham, as "the most successful and the most generally tolerated pirate, perhaps, that ever infested any sea.

[2] He was described by the British statesman Charles Belgrave as "one of the most vivid characters the Persian Gulf has produced, a daring freebooter without fear or mercy".

When asked by one of the English gentlemen present, with a tone of encouragement and familiarity, whether he could not still dispatch an enemy with his boneless arm, he drew a crooked dagger, or yambeah, from the girdle round his shirt, and placing his left hand, which was sound, to support the elbow of the right, which was the one that was wounded, he grasped the dagger firmly with his clenched fist, and drew it backward and forward, twirling it at the same time, and saying, that he desired nothing better than to have the cutting of as many throats as he could effectually open with this lame hand!

After Bahrain was annexed by the Al Khalifa, Rahmah's tribe, feeling dissatisfied with their share of the rewards, moved first to Bushehr and eventually to Khor Hassan in northwest Qatar.

[11] As a result of no centralized authority existing in Qatar from the 18th to 19th centuries, Rahmah was able to establish dominion over much of the peninsula for a period after the Al Khalifa relocated to Bahrain.

Rahmah, the leader of Khor Hassan, reached a compromise with the British in which he agreed not to harbour any fugitivites in return for sparing the town.

[19] Having failed to convince the British for aid, he set off to Dammam with a reinforcement of 35 Balochis from Bushehr and continued waging his war against the Al Khalifa.

Upon discovering the stolen goods, his nephew, Sheikh Ahmed bin Salman Al Khalifa, decided to recover the items and intercept Rahmah at sea.

To ensure he could reach his uncle swiftly, Sheikh Ahmed augmented his boat’s speed by borrowing the oars from the vessel of Isa bin Tarif, the chief of the Al Binali tribe.

His astonishment stemmed from maritime tradition, where young men typically only commanded ships after marriage, as this signified their readiness for responsibility.

Realizing his death was imminent and learning that his loyal slave, Tarar, had been killed, Rahmah retreated to the inner galley of his ship with his eight-year-old son, Shaheen.

[21] Rahmah's legacy lasted long after his death; in the 1960s Charles Belgrave wrote of how old men in the coffee shops throughout the region would still talk of his exploits.