She and I have a tattoo like the attached image. We both find it a perfect symbol of our relationship, as it strikes the right balance of her loving creative-brain nature, and my more engineering-brain rockstar-style personality.
Another potential method would be similar to the old family seals you use to see, such as the George Washington Vanderbilt seal that can be seen on the copper trimmings of the Biltmore house. Here is a link to an image (
https://www.pinterest.com/pin/200339883397915267/).