No,
Gimli was not the
last of his kind: the Dwarves of Erebor (the kingdom refounded after the events of The Hobbit) still existed, and
Gimli does return to his people after the War of the Ring. ... After the fall of Sauron,
Gimli brought south a part of the
Dwarf-folk of Erebor, and he became Lord of the Glittering Caves.
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