The name Percival is a boy's name of French origin meaning "one who pierces the valley". Percival and is often added to lists like Unusual Boy Names and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
There are several Percivals scattered through the Harry Potter series, which might help transform the old-fangled, fussy image it has accrued. Actually, the original Percival was the one perfectly pure Knight of the Round Table, a worthy hero. The name was invented in the twelfth century by a poet named Chretien de Troyes, for his ideal knight in the poem Percevale, a Knight of King Arthur.
Percival is found in other forms of literature as well, including Wilkie Collins's The Woman in White, and Tennyson's "Idylls of the King" contains a section devoted to Sir Percival. Wagner transformed the name to Parsifal for his opera.
Percy, which seems like a nickname for Percival but is really a stand-alone Norman place name, is beginning to attract some favorable attention from cutting-edge namers.