ثWe need to mention that in order for you to know about someone's ancestors, it is necessary to refer to genealogists as we have no knowledge or specialization in this regard.

To give a short and general answer to your question, what is known is that the Razavi Sayyids are the descendants of Imam Reza (a.s.); the Husseini Sayyids are the descendants of Imam Hussein (a.s.) and Musavi Sayyids are the descendants of Musa bin Ja'far (a.s.). Hence, if your family name or surname has not changed over time, your lineage should reach Imam Reza, peace and benedictions of Allah be upon him.