Name #252 of 1000 · Viṣṇu Sahasranāma
सिद्धार्थःsiddhārthaḥ
Siddhartha
He whose every aim is already attained
From shloka 27 · chapter Varāha
असङ्ख्येयोऽप्रमेयात्मा विशिष्टः शिष्टकृच्छुचिः ।
सिद्धार्थः सिद्धसङ्कल्पः सिद्धिदः सिद्धिसाधनः ॥
asaṅkhyeyo'prameyātmā viśiṣṭaḥ śiṣṭakṛcchuciḥ
siddhārthaḥ siddhasaṅkalpaḥ siddhidaḥ siddhisādhanaḥ
Also in this shloka: asaṅkhyeyaḥ · aprameyātmā · viśiṣṭaḥ · śiṣṭakṛt · śuciḥ · siddhasaṅkalpaḥ · siddhidaḥ · siddhisādhanaḥ