I have sometimes published under the name 'Jonathan Jenkins Ichikawa'. I added the 'Jenkins' upon marriage in 2011. Treat this as a middle name. (Alphabetize me under ‘I’.)
I considered 'Jenkins' to be my middle name. It is not part of a compound surname. Its inclusion is optional in all contexts, and it is subject to abbreviation. (Compare the 'Kellogg' in 'David Kellogg Lewis'.)
I publish my newer work under ‘Jonathan Ichikawa,’ with no middle name or initial. I don’t have a strong preference as to whether you include a middle name, middle initial, or neither, when citing my older work in your bibliography. Citations to my newer work should not include a middle name. I use he/him pronouns.
I have prepared the following chart for the convenience of the public.
Inappropriate things to call me
Jon
Jonathan Jenkins-Ichikawa
Poopoo face
Dr. Jenkins
Dr. Jenkins Ichikawa
hey proffessor
The Big Jenk
Professor Jenkins I.
Jenkins Ichikawa, Jonathan
Herr Doktor Doktor Professor Jonnie
late for dinner
Appropriate things to call me
Jonathan
Jonathan Ichikawa
Jonathan J. Ichikawa
Jonathan Jenkins Ichikawa
You there
Dr. Ichikawa
Dr. Jonathan Jenkins Ichikawa
Ichikawa, J.
Ichikawa, J. J.
Ichikawa, Jonathan J.
Professor Ichikawa
Professor Jonathan Ichikawa
My liege
Please note that these lists are not exhaustive.
For citations to my newer work, or describing me now, “Jonathan Ichikawa” is the best name to use.