Daughters:
Poppyfrost - Living, as of Fading Echoes
Honeyfern - Deceased, Verified StarClan member
Cinderheart - Living, as of Fading Echoes
Son:
Molepaw - Deceased, Suspected StarClan member
brackenfur is her mate yes and their children are Honeyfern,molekit,poppycloud,and cinderheart.
four, Cinderpelt, Brackenfur, Thornclaw, and, Brightheart
it is unknown but brackenfur's mother is frostfur.
in book 5 of the 2nd series, at least is when they had their kits!! luv cinderheart!!
Brackenfur (Male), Thornclaw (Male), Cinderpelt (Female), and Brightheart (Female) are all siblings. They are the kits of Frostfur and an unknown father. See related link for the family tree.
No, Brackenfur did not die in the Fourth Apprentice.
Brackenfur became a warrior in the book forest of secrets
Since Tawnypelt is Tigerstar's daughter, Firestar was afraid that Tigerstar would try to hurt any cat who mentored his kits. Firestar is in love with Sandstorm and would do anything to protect her. So he chose Brackenfur to keep Sandstorm safe.
Cinderheart's father is Brackenfur.
Brackenfur's first apprentice was Tawnypaw (Tawnypelt), but Tawnypaw left ThunderClan and joined ShadowClan before she finished her apprentice training.
Although it isn't clear in the book, Lionheart is said to be Frostfur's mate.
Brackenfur dies of old age, honey. The dude lived a long and fulfilling life in ThunderClan, but eventually, his time was up. No dramatic battles or tragic accidents, just the natural progression of time taking him away. Rest in peace, Brackenfur.