Aaron is my name, Sabu is the name of my father and John his father. Also, I do not have a proper surname since it is not part of our custom.
I suggest adopting Sabu as your surname, Aaron as your given name, and John as your middle name, or some variant of that. I think this is advisable, because you'll regularly be asked for your surname and given name, and sometimes your middle name or it's initial. Such an adoption will simplify administration. That said, I appreciate that you might want to follow your customs, rather than those of others.
In terms of publishing,
- Pick a name you'll use forever.
Your name is your brand. It's how you'll be identified.
- Pick a name that is unique (or at least rare, especially to Google).
A unique name is easier to find.
You might decide upon Aaron Sabu, Aaron J. Sabu, or Aaron John Sabu, for instance. Google each and see if it is unique or rare.
As pointed out...there is no obvious choice that will send the message that you want to be called Aaron and cited as Aaron et al. That choice just doesn't fit well in the conventions of the Western naming culture, unfortunately
I disagree, S. J. Aaron or J. S. Aaron could be used (an initial could also be dropped). Citations will appear as Aaron et al. and there seems only to be an option of calling the OP Aaron.