since ibn qutaybah himself stated in one of his compositions that the name of his book is kitab alanwa and this is the name by which it was known after him by ibn alnadim alshayzari ibn khallikan and others no other title should be considered even if abu rayhan albiruni mentioned it. and infallibility belongs to god.
ولما صرح ابن قتيبة نفسه فى تأليف له أن اسم كتابه هو كتاب الأنواء ، وهذا هو الاسم الذى عرف به بعده من لدن ابن النديم والشيزرى وابن خلكان وغيرهم فلا يعتنى إلى عنوان آخر ولو ذكره أبو الريحان البيرونى. والعصمة لله.