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Swami Samantabhadra. The main reason for this is the lack of sufficient resources. Society, through its negligence, has lost much of its historical material, but what remains is not insignificant. However, it is so disorganized and scattered, and there are so many obstacles to knowing and obtaining it, that its existence is almost non-existent. It is neither used by the authorities themselves nor given to others for use, and therefore its gradual destruction (loss) continues, which is a matter of great sorrow! Due to this scarcity of resources, research and examination of historical facts sometimes face great difficulties and obstacles stand in the way. There have been many scholars with the same name; one scholar Acharya has had many names or surnames due to differences in birth, initiation, quality-proof and country-proof, etc. _1 For example, there have been many Acharyas who have borne the names 'Padmanandi' and 'Prabhachandra'. There have been many scholars who have borne the name 'Samantabhadra', some of whom were called 'Laghu' or 'Chik', some 'Abhinava', some 'Gerusoppé', some 'Bhattarak' and some 'Grihastha' Samantabhadra. Some information about the time of all these is given in the introduction of the Ratnakaranḍakaśrāvakācārya written by the author, under the heading 'Doubt about the text'. Swami Samantabhadra was different from all these and he lived long ago.
2 For example, 'Padmanandi' was the first initiation name of Kundakunda Acharya and later 'Kondakunda Acharya' became his country-proof name; because he was a resident of 'Kondakundapur'. In the Gurvalis, your Elacharya, Vakragriva and Grdhrapichcha Acharya are also mentioned, which should be understood as being taken for quality etc. proof and there have been other Acharyas with these names.