Name #970 of 1000 · Viṣṇu Sahasranāma
प्रपितामहःprapitāmahaḥ
Prapitamaha
The great-grandfather — father of Brahma himself
From shloka 104 · chapter Kalki
भूर्भुवःस्वस्तरुस्तारः सविता प्रपितामहः ।
यज्ञो यज्ञपतिर्यज्वा यज्ञाङ्गो यज्ञवाहनः ॥
bhūrbhuvaḥsvastarustāraḥ savitā prapitāmahaḥ
yajño yajñapatiryajvā yajñāṅgo yajñavāhanaḥ
Also in this shloka: bhūrbhuvaḥsvastaruḥ · tāraḥ · savitā · yajñaḥ · yajñapatiḥ · yajvā · yajñāṅgaḥ · yajñavāhanaḥ