Final answer:
The capital city of Brobdingnag from Jonathan Swift's 'Gulliver's Travels' does not have a specified name or meaning provided in the text. Brobdingnag is a fictional realm of giants.
Step-by-step explanation:
The capital city of Brobdingnag is a fictional place from Jonathan Swift's satirical novel 'Gulliver's Travels', and thus, it does not have a specified name or meaning in the text. Brobdingnag is a country inhabited by giants, and is one of the many imaginary realms visited by the protagonist, Lemuel Gulliver.
As Swift does not provide a name for the capital of Brobdingnag, any discussion on its name or meaning would be purely speculative and not based on the text itself.