Lord Shiva is called by many names and the name 'Shiva' is one of the most popular names! The names Maheswara, Parameswara, Ishana, Isha, Pashupati, etc denote that Lord is Ruler due to these names having "Isha" and "Pati" in them which denotes the ruling aspect. Even in Vedas and Ithihasas Lord is frequently called by these names. For example in Valmiki Ramayana:
इदं शुभतरं वाक्यं व्याजहार महेश्वरः | ६-११९-१ Maheswara thereupon delivered the following still more beautiful speech:
अर्चिष्मद्भिर्वृतो भाति भूतैरिव महेश्वरः || ६-७१-१३ He is shining like Maheswara surrounded by ghosts, with resplendent and sharp spikes.
हिमवत्प्रभवे शृंगे सह देव्या महेश्वरः || १-३६-२६ Maheswara settled down along with his consort Uma on the peak of a mountain emerged from Himalayas.
Similarly, in Vedic texts like:
अथ कस्मादुच्यते भगवान्महेश्वरः। (Atharvasira) Why is he called Bhagavan Maheswara?
मायिनं च महेश्वरम् । (Svetasvatara) Maheswara is the controller of Maya
The name Maheswara contains "Ishwara" inherently inside it and hence it denotes the Lordship aspect of Lord ie as Ruler of all.
Similarly, another popular name Ishana also means the Supreme Ruler. Another name Isha also denotes the same. If we look at the name Pashupati also it inherently contains Pati which means Lord of all. The name Rudra also denotes inherent prowess and is thus related to the ruling aspect. Name Sharva is also connected with destroying aspect and thus connected with the Ruling aspect.
But if we Look at the name Shiva, it is mostly associated with aspects like:
The name Shiva has special importance as the Purana is also named "Shiva Purana" after Shiva's name. Vedas also speak of the glory of Shiva Nama and the Panchakshari mantra also contains the name, Shiva.
Does the name Shiva also has an aspect that is connected with the ruling aspect of the Lord ie, which gives the meaning of Ishwara or Ruler?