Agreed - it seems a fairly popular Ethiopian name, why wouldn't it be Amharic?
Can't confirm for sure as I have no knowledge of Ge'ez script or Amharic, but this page on Ethiopian names gives the meaning as 'I saw much':
http://ethiopia.limbo13.com/index.php/ethiopian_names/ethiopian_names_e/and another page on wikipedia for the name Alemayehu gives a translation of 'ayehu' as 'I have seen', as some corroboration:
https://en.wikipedia.org/wiki/AlemayehuThis message was edited 10/24/2014, 10:00 AM