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these are just some naming conventions that i came up with for my maps and character names.

Translation of the picture:
the name consists of a : *root
*ending
the roots for the first name can be different
and there are many roots.
there is a big difference concerning ending.

endings are differently used in first names and surnames
first name endings : -in, is
-on, os
-un, us
-an, as
but surnames end in : -ar

for example : if we have a root (Meh), then using the rule we would get only six possible names.
Mehon, Mehos
Mehun, Mehus
Mehan, Mehas
and the family name or surname from it would be Mehar.

other endings could be used to refer to rivers or mountains or cities
so if a river would be named by mr.Mehan he would probably name it Mehdon >>> Meh his root name, and the suffix don which means river.
and so on, hope this helps