I think the apostrophe is common in some cultures to make sure the name of pronounced correctly. With the one you mentioned Teni, if you take the apostrophe out, you could potentially have people saying something like "lake-San" - as much as it doesn't read exactly how it's printed, to me it doesn't read as anything out there. Just a name if ask how to pronounce.... Perhaps my job has seen me exposed to a lot of names that are from other culture so I don't think they look wrong kwim?
Something like ma'lu honestly makes me think Maori heritage somewhere and wanting the emphasis on the right part of the name (Its not uncommon to see five kids from a family from NZ with apostrophes in their name, and when you hear how it's pronounced the apostrophe makes sense :) )

