Vishnu has several names over scriptures such as Sahasranamam.
Is any name of Vishnu is mentioned as Siva?
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Yes, Lord Vishnu is also called Shiva in few versions of Vishnu Sahasranama. For example, Shiva appears as 27th name in Vishnu Sahasranama found in Mahabharata: Anusasana Parva:
17 सर्वः शर्वः शिवः सथाणुर भूतादिर निधिर अव्ययः संभवॊ भावनॊ भर्ता परभवः परभुर ईश्वरः
17 sarvaḥ śarvaḥ śivaḥ sthāṇur bhūtādir nidhir avyayaḥ saṃbhavo bhāvano bhartā prabhavaḥ prabhur īśvaraḥ
Wikipedia: Vishnu Sahasranama also mentions this in The Thousand Names of Lord Vishnu section:
27 शिवः shivah