Gaining Names?

[ptjw7]

I have a great Uncle Frederick Walton born 21 Jan 1872, on his baptism he was just Frederick and on his just received birth certificate he was just Frederick
On his wedding in 1880, Great Yarmouth he is shown as Frederick John Michael Walton
So is this normal to gain middle names!
I believe these 2 people are one and the same person - even fathers name on marriage cert - even same area of London on 1881 census.
I'm just that little bit unsure

Peter

 

[g d cooper]

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