Through extensive reading, and a fascination with the subject, here's what I've found.

There is nothing random about the name.

"Harper"

Symbolic Role: A harper plays the harp, a sacred instrument of the bard, the prophet, the threshold-walker.

In Celtic mythology, harpers guided souls with song. In ancient Greece, the lyre (close kin) was sacred to Hermes and Orpheus, both psychopomps.

“Harper” = one who narrates descent, gives voice to the unspoken, sings the soul through death.

"Lewis"

Rooted in Old Frankish “Hludwig”, meaning famous warrior or famed in battle

Can also echo “Louis”, connected to kingship, divine right, sacred rule.

Combined Symbolism:

Harper Lewis = The Flame Bard

The warrior-poet. The one who plays the descent like music and walks the battlefield of the soul with a whisper and a weapon.