Srimathe Rangaramanuja Mahadesikaya Namaha
Srimathe Sri Varaha Mahadesikaya Namaha
Sri Velukkudi Krishnan Swamy Thiruvadigaley Sharanam
Sri:

Swamy has taught us:
Deva = The one who plays
Divu Kreeda ithi DhAthu
Kreeda=Play

Kreedachala = The play mountain = Tirumala used in SriVaikuntam

Now why Shabdha like DEvaDevan?

In Tamil, Deivathirkku Deivam (gross similar sounding translation)

DEva DEvam Baje Divya Prabhavam song reference.

Why is there a need to call somebody as DEvAs & Perumal to be differentiated as DEvaDEvAn?

Also, why many Iyer keep name:
VishwanAthan (as Shiva)? When Vishwam itself is Vishnu?

If VishwanAthan = Shiva how LokanAthan = Vishnu?

What is the difference between Vishwam & LOkam?

Why Guru Brahma Guru Vishnu Guru DevO MahEshwara ?

In above shlOkA, is it okay to consider Maheshwara: as ShivA? As I saw one shaivite quoting like that

Eeshwara:, MahA + Eeshwara , Parama + Eeshwara
Deva, DevaDeva, Deva + Aadideva = DevAdiDeva

Gana + Pathi = GanaPathi
Jaga + Pathi = Jagapathi
Sri + Pathi = Sri Pathi

Gana + Eesh = GanEsh
Then we have
MahA + GanEsh why?

These words MahA are superlative

Does it really make a difference between
Ganesh & MahA Ganesh?

Periya Perumal, Periya Periya Perumal

Is it Perum + Aal = Perumal?
Or
Peru + Maal = Perumal?

Perum itself is Periya then why
Perum + Periya? Perum + Periya + Periya?

Why Sriman Narayana donated his Deva & Eeshwara ThirunAmam to others?

Is it to create confusion?

Dasanudasan