The Collaborative International Dictionary of English v.0.48:

Kafka \Kafka\ prop. n.
   Franz Kafka, a writer, b. 1883, d. 1924.

   Syn: Franz Kafka.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Kafka
    n 1: Czech novelist who wrote in German about a nightmarish
         world of isolated and troubled individuals (1883-1924)
         [syn: Kafka, Franz Kafka]