Blethen rhymes with:
mckethan, snethen, anthon, bothun, brethen, cauthen, cauthon, cawthon, donathan, dothan, earthen, elizabethan, ethan, johnathan, johnathon, jonathan, jonathon, jonothan, kathan, lathan, lathon, laythan, lecithin, lengthen, leviathan, louthan, mathan, mcclenathan, mcglothen, mcglothin, mckeithan, mckeithen, mckethan, midthun, mithun, mothon, nathan, pathan, ramthun, snethen, strengthen, swaminathan, trefethen, trevathan, warthen, wathen, witthuhn, worthen
Blethen sounds like:
baldini, baldino, baldoni, baldwin, baltodano, bealeton, beholden, belden, beldin, beldon, belton, billiton, bilton, bladen, blaydon, bolden, boldin, boldman, boldon, boliden, bolotin, bolten, bolton, boulden, boulton, bulletin, bultema, bultman