Qudratullah
Yes. It follows the common theophoric pattern (attribute + Allah) used in Muslim naming practices and is considered valid; it does not appear as a proper name in the Quran but is culturally acceptable.
Yes. The form Qudrat Ullah is attested in modern South Asia; a notable historical bearer is the Pakistani writer and civil servant Qudrat Ullah Shahab (1917–1986).
The root is Arabic: qudrat (ق د ر) meaning power/ability, combined with Allah (الله).
In Urdu contexts it is commonly pronounced 'qud-rat-ullah' (qud-ra-tul-lah), with stress on the second syllable of qudrat.
It is known but uncommon; more frequent are shorter theophoric names, so Qudratullah is considered relatively rare but historically attested in the region.