In your organization, head to the advanced settings and find the ‘Relation names’ configuration. (Organization -> Advanced -> Relation names).

Here you can map multiple Jira relation names to the Ketryx relation types, by following the follow json format:

{
   "<Ketryx Relation Type>": 
   [
      "<Jira relation name 1>",
      "<Jira relation name 2>"
   ]
}

Example: 
Use the name "is child of parent" instead of the default relation name "has parent"

{
   "HAS_PARENT": 
   [
      "is child of parent"
   ]
}