Indeed---that's where we were before we migrated down the Cherer border from Harar and came to occupy the vast Shilaabo prairieThat one map Gubbet posted, Marehan are not just in Ethiopia but deep into it, furthest west of the Somalis in western Ethiopia
And before it we were even further west, northwest of Harar exactly at today's Afar border.
After we moved down Cherer from the declining Harar Emirate---at around today's Fiq District, but certainly between Khelaafo and Ime, the Marehan divided into two; one going east to explore Himan (today's Mudug) and one going south to explore Liban (today's upper Jubba Valley).
The southern group, who came to be known as Guri or Pioneers, were led by Marehan/Hassan Garshireedle section.
The eastern group, who came to be known as Galti or Settlers were led by Marehan/Isaaq Garshireedle section,
Guri and Galti reflect the initial southern group made the better choice as the Eastern group has continued to send successive streams secondary migrants after the trail of the southern group even to this present day.
After having crossed the Shabelle between Ime and Khelaafo, the Marehan/Guri were first in Nageyle before they were in Lugh.
Of course, however, they would branch down the Jubba/Ganane River where Lugh would famously become the center of the Marehan settlement that begin with the long migration from Harar.