Will probably need to call up the bank to confirm, but I guess no harm asking here before I call up the bank.
Many gold/platinum/diamond credit cards include travel insurance cover, the policy also covers family members if the primary card holder is traveling together. Do additional (supplementary) card holder eligible for the same cover? I.e. additional card holder purchased the flights and traveling alone, any cover?
May vary. Read PDS to be final.
In short, for mine, yes it covers the family if purchased together and paid total amount in same cc,
Call the bank which likely will give you the blanket cover number and a phone number of insurance provider.