Since you mention "curriculum vitae", I assume you're focusing on metaphorical rather than physical uses, and on a name for something (rather than using it in a sentence)?
When talking about ideas rather than physical objects, it's not uncommon to put the possession in the singular and the possessor in the plural.
Consider:
- Suetonius' De Vitā Caesārum "on the Life (sg) of the Caesars (pl)"
- Lucretius' De Rērum Naturā "on the Nature (sg) of Things (pl)"
- Flaccus' De Verbōrum Significātū "on the Meaning (sg) of Words (pl)"
For actual physical objects, it's more like in English: use the actual number of possessions, and the actual number of possessors.
- filius senatoris is "the senator's son", one son, one senator
- filii senatoris is "the senator's sons", multiple sons, one senator
- #filius senatorum is "#the senators' son", one son, multiple senators (somehow)
- filii senatorum is "the senators' sons", multiple sons, multiple senators