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Theory of origin from Rajputs
Soomro are a branch of the Sumrah clan of Jats. H.A Rose, who made a comprehensive glossary of the Tribes of Punjab and North West Frontier, mentions Sumra as one of the Jat Tribes of the Western Plains and quotes from other writers like E.O'Brein and describes the Sumra as originally Rajputs. "In A.D.750 they expelled the first Arab invaders from Sindh and Multan, and furnished the country with a dynasty which ruled in Multan from 1445 to 1526 A.D., when it was expelled by the Samma". Colonel James Tod refers to them as a part of the twin clans of Umra and Sumra Rajputs who were a subdivision of Sodha tribe of Rajputs, which in turn has been mentioned as a grand division of Parmar Rajputs who in remote times held all the Rajputana desert. Frequently combining with their brethren the Umars, gave name to a large tract of country, which is even still recognized as Umra-Sumra and Umarkot, and within which Alor and Bhukkar is situated. Some streams of Parmar Rajput are: 01.Shankhala, 02.Kher, 03.Vahal, 03.Mepvat, 04.Alhar, 05.Kaba, 06.Unmar, 07.Rehott, 08.Dhundhar, 09. Soraha, 10.Harir, 11.Maonara, 12.Khimad, 13.Sukhada, 14.Parkora, 15.Bhopura, 16.Sampal, 17. Bhikha, 18.Kalavsar, 19.Kalmoh, 20.Kohwa, 21.Pocha, 22.Dhudh, 23.Kahorava, 24.Deva, 25.Barahar, 26.Jepra, 27.Pansav, 28.Dhuna, 29.Rakomva, 30.Teeka, 31.Mori, 32.Sumrah, 33.Sodha.
- Sen, Sailendra (2013). A Textbook of Medieval Indian History. Primus Books. p. 114. ISBN 978-9-38060-734-4.
- "The Soomras of Sindh: their origin, main characteristics and rule" (PDF). www.uok.edu.pk. University of Karachi , Sindhi department. Retrieved 7 September 2015.