why was the first thing Jesus mentioned in the Lords pray " Let your name be sanctified" ?

It wasn't.

The first thing mentioned was "Our Father".

The second thing mentioned was "who art in Heaven".

The third thing mentioned was "Hallowed be thy name".

One must also take care to consider how Jesus was using the word "name", particularly in light of the fact that God's personal name was already as hallowed, or sanctified, as could be. You can refer to any English dictionary, or if you're a stickler, you can instead refer to a Biblical Greek lexicon, to see the many different meanings **typically** associated with the word "name".

WwwdotBibleSelectordotcom answer sounds correct, but is a long worded misconception.

I assume he like the jews of Jesus' day 'supposed that they will be heard for their many words'. Mat 6:7

The expression "Our Father who is in heaven" is a salutation, the same as saying "Dear God"

It is to whom the prayer (or letter) is addressed.

Thus the first point of concern in this prayer is "God's name".

The reason why is because unless you know it and use it, you aren't really Jesus' disciple.

Joh 17:26 and I have made Your name known to them, and will make it known, so that the love with which You loved Me may be in them, and I in them."

If Jesus hasn't made God's name known to you you do not have his love.

(PS titles such as Lord, God, and Father are not the name Jesus made known.)

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Because to him (as should be to us) the most important thing was that Jehovah's name be used in the proper way. The generic meaning of sanctification is "the state of proper functioning." To sanctify someone or something is to set that person or thing apart for the use intended by its designer. A pen is "sanctified" when used to write. Eyeglasses are "sanctified" when used to improve sight. In the theological sense, things are sanctified when they are used for the purpose God intends. The Greek word translated "sanctification" means "holiness." To sanctify, therefore, means "to make holy." Only God is holy ( Isa 6:3 ). God is separate, distinct. No human being or thing shares the holiness of God's essential nature.

To remind you that Gods name is not for mere mortals to bandy about like it's last weeks laundry. Too bad most people can't understand that.

Nope, He said 'Hallowed'.

maybe he felt that his fathers name was important. You can't have a close relationship with someone that you don't know their name.

That usually comes first.

Because we're commanded to put God first in all things

Thats the first commandment

It's called praise & worship.

Because God, being infinite, needs infinite ego strokes.