Harry

Harry, also known as Halfie, is the son of Ulrika and George.

Pre-birth
Harry's mother became pregnant with Harry in presumably February 8 AE. His late stages of development occurred throughout My Grandmother Asked Me To Tell You She's Sorry, and he was born near the end of the novel on Christmas Eve.

Harry was christened by Marcel a few days later.

Etymology
Ulrika and George considered naming him "Elvir" for a short time (the masculine equivalent of "Elvira"), but later decided to name him Harry after the fictional character Harry Potter, whom Elsa adored.

Trivia

 * Harry has no godparents.