Hi there! I know this reply is a bit late but just to clear things up for everybody else's sake as the anime is coming to end. Attack on Titan is grammatically wrong and something that's lost in translation. It's because of the existence of the particle "no" の in original Japanese title Shingeki no Kyojin 進撃の巨人. To fully understand the mix up we have to dissect the phrase. 進 = enter, advance, or move forward 撃 = beat, attack, defeat, conquer If we combine these two 進撃 , it'd mean something like Rage. 巨= huge, giant 人= man Combine these two 巨人, we'd get gigantic man or Titans like the story implies. So we basically got Rage and Giant, what about の "no"? This is where people get confused. Most people think の is just a possessive particle so they assume many things like Attack of Titans or Marching of Giants, without taking into consideration that the particle の has a wide range of uses like connecting nouns together. Therefore, Shingeki no Kyojin 進撃の巨人 simply translates to Rage Titan or Attack Titan (Eren's original titan power). Which actually makes sense considering that all other titan names follow the same syntax except for The Colossus Titan (超大型巨人 Chō ōgata Kyojin): Founding Titan (始祖の巨人 Shiso no Kyojin) The Armored Titan (鎧の巨人 Yoroi no Kyojin) The Beast Titan (獣の巨人 Kemono no Kyojin) The Cart Titan (車力の巨人 Shariki no Kyojin) The Female Titan (女型の巨人 Megata no Kyojin) The Jaw Titan (顎の巨人 Agito no Kyojin) The War Hammer Titan (戦鎚の巨人 Sentsui no Kyojin) The creator, Hajime Isayama though, thought that making it "Attack on Titan" for English viewers sounds cooler so he stuck with it. But we have to take into consideration that Isayama wasn't fluent in English at the time of its conception which is totally understandable. Check out for more info about の: https://blogs.transparent.com/japanese/japanese-grammar-the-no-%E3%81%AE-particle/ PS. Did you see the latest episode? I still can't get over last week's The Rumbling. Lol

It's more like "Attack On/Charge On" titan : the titan of which the type is " Attack On" Since in the manga/anime you discover that , eren's titan is named The "Attack On/Charge On" Titan, because he's viilent and charges forcefully into battle