* Is it a name? If so, the pronunciation might be unique to the individual or family. It could be pronounced like "LOH-min-jer", "LOM-in-jer", or even something completely different.
* Is it a place name? The pronunciation would likely follow local conventions.
* Is it a brand name? The company or organization might have a specific way they prefer it to be pronounced.
To find out how to pronounce "Lominger", you'd need more information about its context.