"You can call me mercenary, or call me madam, but, as I always tell my customers - just call me anytime!"

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And this is Nymphadora-" "Don't call me Nymphadora, Remus," said the young witch with a shudder. "It's Tonks." "-Nymphadora Tonks, who prefers to be known by her surname only," finished Lupin. "So would you if your fool of a mother had called you 'Nymphadora,' " muttered Tonks.

— J. K. Rowling