The god Irmin is known to our folk by many names. If we look at the symbol of the Irminsul we see straight away the connection Irmin has to the god Tiw. The Tiw rune is one runic interpretation of the Irminsul. Both are Sword gods, as is Seaxnot who again is another aspect of this same god.
This overlap of names and aspects can also be found in place names. The Saxon stronghold of Eresburg was once a major centre of pagan worship, once being the site of an Irminsul. I believe the name Eresburg refers to Ares' burg, Ares being the Greek name for the sword god, thus another aspect of the same god. This is supported by the fact that Eresburg is now Marsburg, Mars being the Roman equivalent. Mars and Ares are both the same as Tyr, who himself is an aspect of Irmin. The symbol for Mars even contains the Tyr-Tiw rune.
We can see how the name of Irmin has manifested in the different cultures and tribes of the Ario-Germanic folk. But behind all these names and the tales that surround them, we find there are common themes and symbols - these all stemming from a single eternal truth. This is what the National Socialist referred to as Gottgläubig - the belief in god. What differs is not the god himself - rather the way we interpret the signs and meanings this god brings.
Our ancestors interpreted the gods through aspects of nature - the gods themselves are subject to the same laws of nature, they are born and they can die - very different to the man made gods of the Abrahamic faiths were god in outside any natural law.
The Irminsul represents these eternal laws of life - the TIR (Tyr-Tiw) rune represents the RIT which is World Order or 'Right Order' - this stems from the Ario-Hindu 'Rita' meaning Truth or Order (Sanskrit ṛta). Rit even gives us the terms ritual and rite. As our ancestors had a deeper understanding of this divinity the interpretation of Rit lore was closer to a natural one - hence so many gods are connected to the Irminsul.