Task: Explanation
Input (English): Sceafa (Old English: "Scēafa" ] , also spelled "Scēaf", "Scēf") was an ancient Lombardic king in English legend. According to his story, Sceafa appeared mysteriously as a child, coming out of the sea in an empty boat. The name also appears in the corrupt forms "Seskef", "Stefius", "Strephius", and "Stresaeus". Though the name has historically been modernized Shava (and Latinized Scefius), J. R. R. Tolkien used the modern spelling "Sheave". Question: What ancient Lombardic king, used by J. R. R. Tolkien, has a grandson named Beowa? Answer: Sceafa
Output (English):  Though the name has historically been modernized Shava and Latinized Scefius, J. R. R. Tolkien used the modern spelling Sheave.