Elkanah was, according to the Books of Samuel, the husband of Hannah, and the father of her children including her first - either Samuel or Saul depending on whether it is those who take the Bible at face value or textual scholars (respectively) that are to be trusted. Elkanah is a bigamist, his other wife, less favoured but bearing more children, was named "Peninnah". The names of Elkanah's other children apart from Samuel/Saul are not given. Wikipedia
The definitive Wikipedia entry for Elkanah. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Elkanah_%28husband_of_Hannah%29