The etymologies (origin of the name and what it means) of these surnames are as follows:

Both names are Muslim names, originating in the Arabic language.

The first one, MASUDI, is not properly represented in the spelling you have given. Transliterated, it would be MAS`UWDIY. Between the letters _S_ and _U_ there is a guttural letter _ ` _, which is difficult to pronounce in western languages.

The name MAS`UWD means "blissful", from the Arabic root _sa`d_, which means "bliss". The suffix _IY_ at the end of the name refers to "belonging to". In other words: Belonging to the MAS`UWD family. The name is commonly used in Iran and in central Asia.

The second name SADDEK, again, properly transliterated would be SAADIQ, which means in Arabic "truthful", from the Arabic root _SIDQQ_, meaning "truth". The name is commonly used all over the Muslim world. If the name ends with the suffix _IY_, it means, "belonging to the SAADIQ family".

Karima
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