salaam,
i will be very skeptical of anyone who is from india/pakistan and has/has not a shijrah and claiming to be a sayyid. a british genetic study on "syeds" from india/pakistan found that eventhough they tend to be more likely to be related to arabs, they actually had more diversity in the number of y dna haplogroups than the non-syeds!! they did not find a syed modal haplotype similar to the cohen modal haplotype to suggest that they have a common ancestor who lived about 1400yrs ago in hijaz. also remember that the prophet (saw) himself could only go back 800yrs regarding his genealogy while you will see these "syed" family trees going back 1400yrs and even longer to ibrahim (as) and sometime to adam (as). these are all made up and fake genealogies and in today's world of genetics carry zero weight. thanks.