I've recently started writing a fan fiction series that features an Andorian character who's grandfather served in Starfleet and wanted to be sure I used the correct terminology to describe their relationship given the four known genders of the Andorian people. Would it be correct to refer to one's grandfather with the prefix grand followed by either thavan or charan, or is there another designation I'm not familiar with? Thanks!
--Sran
--Sran