country cousin

from The Collaborative International Dictionary of English v.0.48

Country cousin \Coun"try cousin\
   A relative from the country visiting the city and unfamiliar
   with city manners and sights.
   [Webster 1913 Suppl.]

from Moby Thesaurus II by Grady Ward, 1.0

43 Moby Thesaurus words for "country cousin":
      aunt, auntie, blood brother, brethren, brother, bub, bubba, bud,
      buddy, cousin, cousin once removed, cousin twice removed, daughter,
      father, first cousin, foster brother, frater, grandnephew,
      grandniece, granduncle, great-aunt, great-uncle, half brother,
      kid brother, mother, nephew, niece, nuncle, nunks, nunky,
      second cousin, sis, sissy, sister, sister-german, sistern, son,
      stepbrother, stepsister, unc, uncle, uncs, uterine brother