HMS Majestic, later renamed HMAS Melbourne (a sop to the Aussies)
Miantonomoh
(US Civil War Coastal Monitor)
Okay...pipped, I see!
Nantucket
(another US Civil War Coastal Monitor)
Old Ironsides(Actually the USS Constitution, but that is what we call it. Oldest commissioned Naval vessel)
Quinsigamond
(Kalamazoo class, Large Coastal/Seagoing Monitors, US Civil War)
oooh, I'm not worthy! <genuflecting to dev>
USS Rhode Island
I believe there is a USS Utah.
HMS Valiant (Nuclear-powered Fleet submarine)
USS West Wind, a US Coast Guard Icebreaker, decommissioned.
I'm pretty sure there's no X, so I'll go with the USS Yorktown.
Xian, a Chinese Destroyer
Good one, Sam!
Yun Yang (Taiwan, WWII Destroyer)
Not sure if there is one that start with "z"
HMS Zealous
Please some one else pick a topic...handling yet another dog disaster...