The duration of Son in Law is 1.58 hours.
Mother-in-lax & Son-in-law - i think it is correct
The possessive form of the singular noun son-in-law is son-in-law's.Example: My son-in-law's name is Harry.
Tutankhamen was Akhenaton's son in law
The term son-in-law comes from how law is often used with prepositions like "in" and "by". Son-in-law just became a more popular term to use over son-by-law.
Son in law is singular. The plural would be sons in law.
The duration of The Law Is the Law is 1.58 hours.
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The duration of The Elder Son is 1.45 hours.
The duration of Son of the Mask is 1.55 hours.
The duration of Son of the Navy is 1.2 hours.
The duration of Son of Geronimo is 4 hours.
The duration of General's Son is 1.8 hours.
The duration of Son of Babylon is 1.5 hours.
The duration of The Son's Room is 1.65 hours.
The duration of The Rising Son is 660.0 seconds.
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The duration of My Son Is Guilty is 1.05 hours.