Rabbi Aryeh Lebowitz

But that's if you can get everyone to have that practice of putting the word kohen after the kid's name.

In the Chuvos Melamed L'Hawil of Ne'ezer Simen Lamed Dalet, he has a similar but different suggestion.

He says for a Kohen kosher, you should write Ploni HaKohen Ben Ploni HaKohen.

Write the word HaKohen next to both of their names.

And then, when you write only Ploni Ben Ploni HaKohen, everyone will realize it must be a Chalol.

But again, that assumes that you're able to establish a standard practice of writing Ploni HaKohen, Ben Ploni HaKohen.

He acknowledges that the Ramad doesn't sound this way, that that's the practice.

The Get Pashut in Simuchuv Chavtasiv Katn Lamed Vav is explicit that we only write HaKohen once, but maybe this is a suggestion, says Lamed Lahuil.

A friend of mine, Seth Polliner, sent me, when I met, I told the story once before, that in Rabbi Sablovsky's new Sefer, the Eli Deitch, Rabbi Eli Deitch Sefer, on the Shurim on Kiddushin, so in the back they have a whole bunch of really valuable stuff from Rav Shechter and Rav Willig about Seder Kiddushin, so it says over there, in footnote 74, that Rav Shechter noted that according to Rav Eliezer Telzer, Gordon, if a person is indeed a halal, the ksuba should state that

V'hu Kohen when the father's name is mentioned.

So that it's clear that the father is a Kohen and the chasun is a Chalom.

Meaning it's El Azar ben Aaron V'hu Kohen, not Ha Kohen.

Ha Kohen would indicate that it's going on both of them.

V'hu Kohen.

Why V'hu Kohen?

Based on the passage which refers to Malki Tzedek by saying V'hu Kohen in Bereshit's parakeet,

The Gemara in the Darmadaph, Lamed Bez, Lamed Bez explains that since he said Baruch Avram, before he said Baruch Kelelyon, his sons lost the Kohen.

So the phrase V'hu Kohen indicates that only he is a Kohen, as opposed to his children who are not Kohanim.

So therefore, when a chassen is a Kohen, there's no need to write Hakohen each time you put his name.

The first time when you have him, Ben, his father, you can write Hakohen after the father's name.