However, some people are skeptical about this explanation because it first appeared in "SEN no Rikyu Yuishogaki," which was written by Rikyu's grandson Sosa KOSHIN, and there are no historical materials written by Rikyu's contemporaries that tell the same story about Rikyu's family name.
ただしこの説の初出である「千利休由緒書」は、利休の曾孫である江岑宗左によるものであり、利休の同時代史料には見当たらないところから内容を疑問視するむきがある。