847K accounts from Baby Names (babynames.com) were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
Was your email address in this breach?
We display where your address leaked and what went with it. We never store the address.
We don't store your address. It is checked right here against about 1029 breaches, including this one.
Email addressesPasswords
In approximately 2008, the site to help parents name their children known as Baby Names suffered a data breach. The incident exposed 846k email addresses and passwords stored as salted MD5 hashes. When contacted in October 2018, Baby Names advised that "the breach happened at least ten years ago" and that members were notified at the time.
Source: Have I Been Pwned (CC BY 4.0)