Sentence:  These men were grandsons of a certain Guntram, who, according to some authorities, is <WSD>identical</WSD> with a Count Guntram who flourished during the reign of the emperor Otto the Great, and whose ancestry can be traced back to the time of the Merovingian kings. 
Meaning of the word marked with <WSD> tags:  Not different or other; not another or others; not different as regards self; selfsame; numerically identical.