'On me pe rewe' must have been unique, for already in O. E. it was very usual to intensify invocations by pu — never by j.e. The following instances have been taken from Godcunde Lar & Peowdom:
p. 138, Ne leedpu us to wite in wean sorge. p. 154,wordpu min onfoh, wuldres Ealdor.
p. 158, JVc'S pu gemyndig miltsa j)inra.
p. 165, Ne awyrp pu me, wuldres Ealdor; rece pu heo swylce, }>a3t hi on worulde wynnum lifigen.
p. 178, f)u min gebed, maere Drihten, gehyr.
p. 125, Ne forweorn pu me, wuldres Drihten.
Nothing was therefore more natural than that pe should be replaced by pu, poli, and thus i-eive ]>ou on me became a very usual form of invoking compassion, mercy etc., as the following passages representing all three dialects, will show. Northern dialect.
Cursor Mundi 141 /3 C, Lauerd, of hitn pon reu; the other MSS. have on him.
Ibid. 24564 C, For drighten luue, yee reu o me; other MSS. similar.
Ibid. 24571 C, Yee reu o me, for-J i; other MSS. sim. Ibid. 245643, only in G, Leuedi, for |>at suete ioy, pit reu on me.
Thomas of Ere. 87, Camb. MS., lovely lady! pon re-a' on me.
Ass. of Oure Lady 526, Camb. MS., now. y the pray, on me pon rewe.
Wright's Chaste Wife 186, Good dame, on me pon rewe!
Poems Harl. MS. 2253 172/13, weylawei 1 whi seist Jiou so ? pon reive on me, ]iy man.
Ibid. 204/165, Iesu, jtin ore! Jtou rewe of me.
Ibid. 206/19, nioder, pou rewe al of pi bern. 64. Occasionally pou is omitted; such instances show that rewe had begun to be taken for an ordinary Imperative.
Thom. of Ere. 87, Thornton MS., lufly ladye! rewe on mee.