Percival is often explained as "pierce the valley," though that reading may be a later poetic gloss rather than the name's true root, which remains genuinely unclear. What has stuck regardless is its association with a knight defined by a long, uncertain search -- a name tied to quest more than arrival.
Don't demand harmony from Mars nor fracture from Venus; be rigorous on this and never divert a celestial body from its path. - Picatrix (Andalusia, ~1000.AD)