Some of my favorite grouchy people were born in early January, it seems. First we have Mary Russell on January 2nd, on no lesser word than that of her author editor
Laurie R. King; then Sherlock Holmes on January 6th, a date not explicitly given in canon but nonetheless widely accepted among Holmesians as correct due to Holmes's penchant for quoting Twelfth Night.
We know also that Dr. Gregory House was born in early-to-mid January, and seeing that he shares a house number with Holmes, it doesn't seem much of a stretch to propose January 6th as his birthday as well. And then, of course,
J.K. Rowling has informed us that Severus Snape was born on January 9th.
Is it an astrological thing to have brilliant, misanthropic, sarcastic, obsessively driven characters born in January, or is there some other logic behind it?