What do the server names like "pender" and "thetis" mean?

Our headquarters are located on Vancouver Island off the west coast of British Columbia, Canada.  "Pender", "Thetis", "Galiano", "Saltspring", etc. are all actual islands located around us, so we've named each of our hosting servers after them.

Note: that the servers themselves are actually located on the mainland.

Also Read

FTP Access
Self Migration From Islandnet to Islandhosting
Can you update my WordPress sites for me?
Why should I enable privacy for my domain?
How do I change my billing period type but remain on the same plan?