ዕርድ

Apparently via Tigrinya ዕርዲ (ʿərdi), interpreting the nisba as their default ending, from Arabic ⁧عُرْضِيّ⁩ (ʕurḍiyy), from Ottoman Turkish ⁧اردو⁩ (ordu).

ዕርድ • (ʿərd)

1. fortified camp, fort
   • 1962, Amharic Bible, Jeremiah 52:4:

     ሴዴቅያስም በነገሠ በዘጠነኛው ዓመት በአሥረኛው ወር ከወሩም በአሥረኛው ቀን የባቢሎን ንጉሥ ናቡከደነፆርና ሠራዊቱ ሁሉ በኢየሩሳሌም ላይ መጥተው ከበቡአት በዙሪያዋም ዕርድ አደረገ።

     sedeḳyasm bänägäśä bäzäṭänäñaw ʿamät bäʾäśräñaw wär käwärum bäʾäśräñaw ḳän yäbabilon nəguś nabukädänäṣ́orna śärawitu hulu bäʾiyärusalem lay mäṭtäw käbäbuʾät bäzuriyawam ʿərd ʾädärägä.

     And it came to pass in the ninth year of his reign, in the tenth month, in the tenth day of the month, that Nebuchadrezzar king of Babylon came, he and all his army, against Jerusalem, and pitched against it, and built a fort against it round about.