FLAGSTAFF, Ariz. — To those who know and love the Grand Canyon, the names of its historic lodges are synonymous with the national park itself. Phantom Ranch, Bright Angel Lodge, El Tovar — all bring to mind a place coveted worldwide for its sweeping views, river rapids and history told though layers of geology. But the fate of those names is up for debate after a longtime Grand Canyon concessionaire applied to trademark them. Approval of its bid would mean Xanterra Parks & Resorts could charge …