Sikarwar Rajputs are believed to be descended from the Sika dynasty, which ruled over parts of present-day Rajasthan and Madhya Pradesh in the 12th and 13th centuries. Somvanshi Rajputs, on the other hand, are believed to be descended from the Soma dynasty, which ruled over parts of present-day Odisha, Chhattisgarh, and Andhra Pradesh from the 3rd to the 12th centuries.
In terms of their traditions, Sikarwar Rajputs are known for their martial prowess and their strong sense of community. Somvanshi Rajputs are known for their religious devotion and their love of learning.
While there is no strict rule against inter-caste marriage between Sikarwar Rajputs and Somvanshi Rajputs, it is not a common occurrence. This is because the two sub-castes have different traditions and customs, and there can be some social pressure to marry within one's own caste.
However, if two individuals from different sub-castes are in love and wish to marry, they can do so with the approval of their families and community leaders. In recent years, there have been an increasing number of inter-caste marriages between different Rajput sub-castes, and this trend is likely to continue in the future.