▁from ▁each ▁other ▁( such ▁as ▁Joseph ▁who ▁was ▁ab yd ik os ▁and ▁the ▁kom mer ki arios ▁of ▁Ce ph allen ia ▁and ▁Th ess al onica ). ▁Some ▁kom mer ki ario i , ▁such ▁as ▁the ▁kom mer ki arios ▁of ▁Pres lav ▁and ▁the ▁kom mer ki arios ▁of ▁the ▁Bulg ari ans , ▁were ▁trade ▁inspect ors ▁in ▁the ▁northern ▁B alk ans . ▁They ▁held ▁court ▁titles , ▁such ▁as ▁prot os path arios ▁of ▁the ▁Ch rys ot rik lin os ▁or ▁mand ator , ▁but ▁could ▁have ▁specifically ▁" com mer cial " ▁positions ▁such ▁as ▁met re tes ▁( G reek : ▁ μ ε τ ρ η τ ή ς , ▁" me as urer "). ▁A ▁" m eg as ▁kom mer ki arios ▁of ▁the ▁West ", ▁titled ▁sp ath ar ok andid atos , ▁appears ▁on ▁a ▁se al ▁dated ▁to ▁the ▁second ▁half ▁of ▁the ▁ 1 0 th ▁century . ▁▁▁▁ ▁The ▁kom mer ki ario i ▁appeared ▁in ▁ch ry sob ull s , ▁at ▁least ▁until ▁ 1 1 9 6 , ▁as ▁collect ors ▁of ▁kom merk ion . ▁However , ▁the ▁author ▁of ▁the ▁Life ▁of ▁Ath anas ios ▁of ▁Ath os ▁already ▁identified ▁a ▁kom mer ki arios ▁as ▁the ▁By z antine ▁equivalent ▁of ▁pra ktor . ▁ ▁References ▁ ▁S ources ▁ ▁Category : By z antine ▁fis cal ▁offices ▁Category : Custom s ▁officials ▁Category : T ax ation