From Wikipedia:

Swahili (called Kiswahili in the language itself) is the first language of the Swahili people (Waswahili), who inhabit several large stretches of the Indian Ocean coastline from Kenya to northern Mozambique, including the Comoros Islands.^[2] Although only 5-10 million people speak it as their native language,^[1] Swahili is a lingua franca of much of East Africa and the Democratic Republic of the Congo, is a national or official language of four nations, and is the only language of African origin among the official working languages of the African Union.

"Hussein", by the way, is Arabic for "good" and "small handsome one."

And we might as well complete the etymology:

WHAT IS THE MEANING OF OBAMA

Obama is a name from the Luo ethnic group of southwestern Kenya, where Barack Obama Sr. was born. It was originally the given name of Barack Obama's great-grandfather. It is based on the Luo (technically, Dholuo, the name of the language of the Luo) word bam, which means "crooked, slightly bending" . The prefix O- means "he", and many Luo male names begin with it. Since most traditional Luo names were given by the baby's mother referring to something about the child's birth, the best guess is that when Obama's great-grandfather was born one of his arms or legs looked slightly bent.

So no, that doesn't mean "crooked" as in Richard Nixon crooked! Let us think of it in terms of Taoist philosophy, as in the "reed (or bamboo) that bends in the wind, but isn't broken", a symbol of strong character in Chinese philosophy.