The Dhodia have subdivisions called kuls which are equivalent of individual clan (gotra in Hinduism). The name of the kul is passed on in a patriarchal manner and it is believed that if you share the same kul, you are a part of the same family and share a blood tie. There is no hierarchy in the kuls and all kuls are considered to be equivalent. Thus, though marriages of Dhodia are conducted within Dhodia, they are not conducted within the same kul. Probably this was an old time way to prevent inbreeding.
In Hinduism, Gotra is a term applied to a clan, a group of families, or a lineage - exogamous and patrilineal - whose members trace their descent to a common ancestor, usually a sage of ancient times. A gotra is of immense importance to a Hindu for it shores up his identity. All Hindu ceremonies require a statement of the gotra. Gotra also comes of use during the performance of the rites of passage or sanskaras. People of the same gotra (sagotra) are not allowed to marry, to prevent inbreeding. In this context, the Dhodia consider themselves to fall under the gotra 'Kashyap'
Following is the list of all Dhoida Kul
(I have borrowed most of the list from the Gandhinagar Dhodia website, Some were found after communication with friends in communities and others from refrences available in the literature. If any have been left out, please email me and i will add to the list)