Surname Kaloustian (Калустян 
, Kaloustian 
, Калустьян ) , all around the world, is quite a rare last name. The cognomen Kaloustian is characteristic of Lebanon, where it is quite a rare surname, France, where it is a rare surname, and Russia. In absolute terms, it is the most numerous in Russia, France, and the United States. Very seldom, Kaloustian is the forename as well as the last name.
| ovsanna kaloustian TR (b. 1906) |
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| adam kaloustian American television producer, GB (b. 1980) |
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| marie-julie kaloustian French lawyer |
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| marc krikor kaloustian researcher (ORCID 0000-0002-0811-6935) |
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