Final answer:
Ferdinand Magellan, a 16th-century Portuguese navigator, lent his name to the Magellanic Clouds, which are irregular galaxies that his crew first recorded.
Step-by-step explanation:
The 16th-century Portuguese navigator who lent his name to the galactic clouds first recorded by his crew is Ferdinand Magellan. These galactic clouds are called the Magellanic Clouds. They are irregular galaxies that are among our nearest extragalactic neighbors and can be observed prominently from the Southern Hemisphere. Their names reflect the fact that Magellan and his crew were the first Europeans to notice them during their round-the-world journey.