Thorin Oakenshield
Dwarves were long-lived, with a lifespan of some 250 years. They breed slowly, for no more than a third of them are female, and not all marry. Tolkien names only one female, Dís, the sister of Thorin Oakenshield. They are still considered children in their twenties, as Thorin was at age 24; and as "striplings" in their thirties, as Dáin Ironfoot was aged 32; all the same, at that age he killed Azog, the orc chieftain of Moria. They had children starting in their nineties.