Actually, I just spent an hour digging on Somali clans to see if I could find a connection between Barre and Elmi. Nothing to report yet. But if her father's actual name is Yusuf Abdi Ali, then that will help the digging.
Here's a source I'm using but there are many others. Maybe an autist of two wants to get in on it. It contains this helpful jewel.
SNF - Somali National Front *
Clan Reference: Marehan (ex-president Siyad Barre's supporters; general 'Hersi' Morgan's group)
Location in Somalia: south and central
https://core.ac.uk/download/pdf/15601742.pdf