Thanks to Mariah Carey, everyone now knows this name – and is aware that Mariah's pronounced with a long i – just as Maria was in the Jane Austen era. And though Mariah now sounds modern, it was heard as far back as 1550 in Great Britain.

Where Abraham took his son Isaac to sacrifice him. Taylor Hanson chose this as the middle name for his son Viggo, his fourth child, but most will see it as a girls’ name. Make life simpler and spell it Mariah.

Vowel names are popular, but this word-name possibility takes it to an extreme.

Indalecio is an old Spanish name that is newly popular in Argentina.

Diago is sure to be confused with the more common Diego, the Spanish form of James.