The name أَحْمَدُ follows the pattern أَفْعَل, a verb-like pattern; its initial hamza is also among the imperfect prefix letters.
When Aḥmad is a person’s proper name, proper-name status and verb pattern combine, so it is ordinarily diptote.
It has ḍamma in nominative, fatḥa in accusative and ordinary genitive, without tanwīn.
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Diptote Causes — Verb Patterns and Their Conditions
The name أَحْمَدُ follows the pattern أَفْعَل, a verb-like pattern; its initial hamza is also among the imperfect prefix letters.
When Aḥmad is a person’s proper name, proper-name status and verb pattern combine, so it is ordinarily diptote.
It has ḍamma in nominative, fatḥa in accusative and ordinary genitive, without tanwīn.