1. Ṭalḥah is a proper name ending in feminine tāʾ, hence a diptote; the common noun مَدْرَسَةٌ is normally fully declinable.
2. Zaynab and Hind are semantically feminine proper names, but Hind has a special dual-declension allowance.
3. Ḥublā and ḥamrāʾ contain a feminine alif counting as two causes, so proper-name status is unnecessary.
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Causes of Diptote Status — Femininity and Its Conditions
1. Ṭalḥah is a proper name ending in feminine tāʾ, hence a diptote; the common noun مَدْرَسَةٌ is normally fully declinable.
2. Zaynab and Hind are semantically feminine proper names, but Hind has a special dual-declension allowance.
3. Ḥublā and ḥamrāʾ contain a feminine alif counting as two causes, so proper-name status is unnecessary.