tā / men / suī / rán / xìng / bù / tóng / ， / dàn / jīng / guò / kǎo / zhèng / fā / xiàn / qí / shí / shì / tóng / zōng / de / 。

他们虽然姓不同，但经过考证发现其实是同宗的。

Although they have different surnames, research has revealed they actually share common ancestry.