The best replacement for tristan is incursus.

The best alternatives to tristan are rated as following:
★★★★★  incursus
★★★  rifter
★★  tristen
★  atron
★  lancelot
★  tristram
  algos

Your alternative for tristan is not listed? Suggest!
Speaking about tristan, one probably shouldn't forget about rory.

Other search terms related to tristan and their ratings are:
★★★★★ rory
You have in mind a companion for tristan and it is not yet here? Propose!



Google Trends

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tristan
incursus
rifter