Complex sentence: Shankara's "gotram" (lineage) and "sutram" (recension-familial vedic trend) are known as being of Atreya lineage and of Aswalayana recension.
Split into simpler sentences: Shankara's "gotram" (lineage) and "sutram" (recension-familial vedic trend) are known. He is identified as being of Atreya lineage and of Aswalayana recension.