Amaranth Brandybuck, born in T.A. 2904, was the second child and first daughter of Gorbadoc Brandybuck and Mirabella Took.
1 She had six siblings: Rorimac, Saradas, Dodinas, Asphodel, Dinodas and Primula. Amaranth died in T.A. 2998, aged 94.
References
1 - J.R.R. Tolkien, The Lord of the Rings, Appendix C, "Brandybuck of Buckland"