Meaning: Name of the First Sikh Guru to whom dhur di bani was first revealed.
Guru Nanak Dev Ji is the proper way to address him. Out of respect and reverence, the name Nanak is typically not given to Sikh children. However, if one chooses to adopt it, it is their personal decision to do so as long as the names of the Guru's are not disrespected.
Spiritual Significance 📖ਪੰਨਾ 140, ਸਤਰ 8
ਨਾਨਕ ਸਤਿਗੁਰੁ ਸੇਵਨਿ ਆਪਣਾ ਸੇ ਆਸਾ ਤੇ ਨਿਰਾਸਾ ॥੫॥
नानक सतिगुरु सेवनि आपणा से आसा ते निरासा ॥५॥
Nānak saṯgur sevan āpṇā se āsā ṯe nirāsā. ||5||
O Nanak, those who serve their True Guru, rise from desire to desirelessness. ||5||
ਮਃ 1 - view Shabad/Paurhi/Salok