Wa `alaykum As-Salamu waRahmatullahi wa Barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
Dear questioner, we would like to thank you for the great confidence you place in us, and we implore Allah Almighty to help us serve His cause and render our work for His Sake.
Answering your question, Sheikh Ahmad Kutty, a Senior Lecturer and an Islamic Scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
If you are implying that your baby died because of her name Amira, then you are being superstitious. The baby died because of the will of Allah. Allah is the one who gives life and takes it way; we ought to accept His will without protest.
As for the name of Amirah you may do well to change it, not because of bad omen; rather, it means leader or commander; and hence it smacks pride. There is no shortage of good names to choose from: Maryam, Aminah, Khadijah, Rahmah, Haleemah, Aishah, Fathimah, etc. are some good names to consider.
Allah Almighty knows best.