Sentence:  Of course Crake wasn't Crake yet, at that time; his name was <WSD>Glenn</WSD>. Why did it have two n's instead of the usual spelling? "My dad liked music," was Crake's explanation, once Jimmy got around asking him about it, which had taken a while. "He named me after a dead pianist, some boy genius with two n's." 
Meaning of the word marked with <WSD> tags:  (from=surnames), fairly popular in the middle of the 20th century.