They consolidated their hold under several able leaders. The most important was Mswati II, from whom the Swazis derive their name. Under his leadership in the 1840s, the Swazis expanded their territory to the northwest and stabilized the southern frontier with the Zulus. | They consolidated their hold under several able leaders. The most important was Mswati II, from whom the Swazis derive their name. Under his leadership in the 1840s, the Swazis expanded their territory to the northwest and stabilized the southern frontier with the Zulus. |