The Collaborative International Dictionary of English v.0.48:

Germane \Ger*mane"\, a. [See German akin, nearly related.]
   Literally, near akin; hence, closely allied; appropriate or
   fitting; relevant.
   [1913 Webster]

         The phrase would be more germane to the matter. --Shak.
   [1913 Webster]

         [An amendment] must be germane.          --Barclay
                                                  (Digest).
   [1913 Webster]

WordNet (r) 3.0 (2006):

germane
    adj 1: relevant and appropriate; "he asks questions that are
           germane and central to the issue"

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "germane":
   a propos, ad rem, admissible, affiliated, agnate, akin, allied,
   appertaining, applicable, applying, apposite, appropriate, apropos,
   avuncular, belonging, closely related, cognate, collateral,
   congeneric, consanguine, consanguinean, consanguineous,
   distantly related, enate, foster, german, in point, involving,
   kindred, material, matrilateral, matrilineal, matroclinous,
   novercal, of the blood, patrilateral, patrilineal, patroclinous,
   pertaining, pertinent, related, relevant, sib, sibling,
   to the point, to the purpose, uterine