I mean, don't get me wrong, I'm all for this if I can't get my way outright. If she telepaths Berra everything the vision of the Enemy having counters to sorcery and sight may throw him off his plan to have the Saiyans go back into the larger galaxy under the assumption that the locals and masques will be sufficient long enough to get his head together and take the most very basic precautions. If she just tells him that she just saw the death of, "Gohan", he's likely to realize that she's contaminated Maya too much for his plan to work and he'll have to just bring her into the masquerade as normal. If she leaves out, "Gohan", and just says, "great grandfather", he's naturally going to assume that his current course of action has provoked his seer daughter to have a vision of Lord Oni and have just about the most intense, "Oh, shit, what am I doing?" moment possible, leading to caution.
I'm just pointing out that you are voting for an approach which achieves the
exact opposite of your stated intents, which might indicate that this is a good moment to step back, question your judgement, and wonder if perhaps those intents are just as mistaken as your plans for pursuing them.
Screams "Saiyan" to who? Maya? Maya's likely never even heard of the name Gohan, I doubt she'll be going off into space before learning about the Saiyans, and even if she did, I doubt she'd ever mention the name of her friends great-grandfather which she'd have heard literally once.
By that logic, they could just drop the masquerade altogether and introduce themselves as aliens, because the Garenhulders don't know what Saiyans are, can't do anything about it, and aren't likely to go into space. Obviously, they've instead decided that even letting the Garenhulders observe identifying information is too dangerous, possibly in case some alien scouting mission comes along and interacts with the locals. The name, "Gohan", is
extremely identifying information, possibly even more so than just being a race of humanoids with tails.
There is a
reason that they use different names for their masques. They've been around for hundreds of years, since the times when the locals were at a medieval level of society, and more than enough time to change the naming conventions of the locals until they were uninteresting. They chose to keep them secret instead. The very fact that it is unusual to her makes it more likely that Maya will find it salient and memorable, especially during this extremely emotional flashbulb memory.
She might not ever mention the name, but she also might not ever mention her best friend having a tail. The Saiyans don't like taking those chances. The whole point of Berra's plan is to clarify the boundaries of the masquerade because Maya knows and will be able to reveal some things, but not others, and this muddies those boundaries enormously by making her aware of something that absolutely can't be argued
isn't covered under the masquerade.