Riddle: Mary's mother had four children. The first was a daughter born in April. She named her April. The next was born in May. She was named May. Then came a daughter born in June. Unsurprisingly, she was named June. The final daughter was born in July. What was her name?
Answer: Mary's mother had four children. If none of the others were named Mary, then it had to be the fourth. Thus, her name was Mary.