If this question is relevant to you, consult your rabbi. (Indeed, if it's relevant to you, then you're getting married — mazal tov! — and should have someone officiating your wedding who knows the main rules, knows how to find out the other rules, and will be able to answer this question for you.)
But for background information, here's a source: Aruch Hashulchan, Even Haezer 129, discusses, in general, the spelling of names in general and, in particular, the spelling of a number of specific names, including a number that end with yod he. He does not say to curtail the name before the he or to replace the he with an apostrophe. (Nor does he indicate that one should put a hyphen or apostrophe between the yod and the he.)
However, I can think of two reasons this Aruch Hashulchan may possibly not apply to your question: First, he's discussing gitin (bills of divorce), not k'subos (prenuptial agreements), and my impression is that the exactitude we enforce on writing names correctly is stronger for the former. Therefore, perhaps we wouldn't mind modifying a name slightly in a k'suba, if there is some benefit to doing so. Second, he does say that the spelling of a name often follows how it is used by the person (how, for example, the person signs that name); it may follow, then, that his not mentioning curtailing or replacing the final he in a get is because no one signed his name that way in his day (and place) and that it should be done now if the name's owner does so.