Diboko, in the Sotho-Tswana languages, is the name of clan or family. The Sotho-Tswana language group is a group of closely related Bantu languages spoken in Southern Africa including Tswana ( Setswana) Northern Sotho A clan is a group of People united by Kinship and descent, which is defined by perceived descent from a common ancestor 
In the Southern African Sotho-Tswana languages (Sesotho, Setswana, and the Northern Sotho language) and the traditions of the clan speakers, different groups identify themselves with certain clans. Southern Africa is the Southernmost Region of the African Continent, variably defined by Geography or Geopolitics. The Sotho-Tswana language group is a group of closely related Bantu languages spoken in Southern Africa including Tswana ( Setswana) Northern Sotho History Should include probable history of the language what form of Bantu it is most closely derived from (the coolest forms! dates of movement of major groups Tswana ( Setswana) is a Bantu language written in the Latin Alphabet. Northern Sotho ( Sesotho sa Leboa in the language itself is one of the official languages of South Africa, and is spoken by nearly five million—4208980 people The groups believe in the existence of the Modimo wa Kgale (God of the Old) or the "Invisible One. " As legend has it, they came out of a marsh called "Ntswanatsatsi" (the place from where the sun emerges) and each clan was assigned a totem where each totem is symbolized by a 'dignified' animal. In Geography, a marsh, or morass, is a type of Wetland which is subject A totem is any supposed entity that watches over or assists a group of people such as a family Clan or tribe ( Merriam-Webster Online Dictionary and Webster's
The selection and assignment of these animals is based on either one of two things or both: the wildness of these animals and how dignified they seem to the group. This was done to symbolize the "Invisible One". It is because of this that these totems are sacred.
In the meditation of the spirits of the deceased are also believed to give guidance and direction in the groups' under takings and dangers. Unity in this group of people still exists, although the practicing of rituals is not as strict as it used to be. The practicing of different rituals is specific to a clan: all rituals - from marriages, to circumcision, to births and burials. This also happens to be one of the ways in which the clan names are preserved. Another is the naming of children after their predecessors as a way to make sure that the names of each clan are commemorated and kept within each family in each group, in effect keeping the clan intact. The Sesotho name for this is "theellano," naming a child after their grandparents or great-grandparents.
A further important way of keeping the clans intact was reciting the clan's Seboko (singular form of Diboko). Raletshabisa Motale, from the village Dikhelekeng, in Butha-Buthe, Lesotho, who has studied the Basotho culture, argued recitation of the Seboko (clan Name) means an identification of a person, a self-explanation according to the one's family from which one descends. Butha-Buthe (also Buta-Buthe) is the capital city or camptown of the Butha-Buthe District in Lesotho. Lesotho (lɪˈsuːtuː) officially the Kingdom of Lesotho, is a Landlocked country and Enclave — entirely surrounded by the Republic of South The Basotho people have lived in Southern Africa since around the fifteenth century.
Switching from one Seboko to the other is not an easy task. It only occurred in extreme cases where, for example, a person had to change his identity because he had to flee into another family in a different clan. Another example is when a woman married. An offering had to be made to the Badimo (the spirits of the deceased) and then an acceptance by the Badimo would be given to the one who is switching families.
The reason there are so many clan names is because of the splitting up of groups. Some people wanted independence, and some violated the law so they were forced out. 
(cf. Bataung is one of the three main Basotho tribes or clans who speak Sesotho, the other two being Batlokwa and Bakoena. Matsela and Moletsane 1993:7)