орден: в знач. "знак отличия", у Петра I; см. Смирнов 212. Заимств. из нем. Orden, первонач. "сословие", ср.-в.-н. оrdеn от лат. ordo, -inis "ряд, порядок"
ordain: c.1290, "to appoint or admit to the ministry of the Church," from stem of O.Fr. ordener, from L. ordinare "put in order, arrange, dispose, appoint," from ordo (gen. ordinis) "order." The notion is "to confer holy orders upon" (see order). Meaning "to decree, enact" is from 1297; sense of "to set (something) that will continue in a certain order" is from c.1315.
order:c.1225, "body of persons living under a religious discipline," from O.Fr. ordre (11c.), from earlier ordene, from L. ordinem (nom. ordo) "row, rank, series, arrangement," originally "a row of threads in a loom," from Italic root *ored(h)- "to arrange, arrangement" (cf. ordiri "to begin to weave," e.g. in primordial), of unknown origin. Meaning "a rank in the (secular) community" is first recorded c.1300