Andongni 安東尼 is the default phonetic translation of your first name, Anthony. It's good enough if you just want to be able to write your name in Hanzi for whatever reason. However, I believe if you are truly interested in Chinese language and/or culture, adopting a "true" Chinese name would be better.
My first name is Antonio (Portuguese for Anthony - means "invaluable"). My family name is Guerreiro (means "warrior")
Several years ago I had a Chinese mandarin teacher who gave me the Chinese name 戈安東 (Ge Andong), because I am a martial arts teacher and Ge can be translated as lance, spear, halberd. And, beyond that, Ge sounds like the first syllabe of my family name, and Andong sounds like my first name.
I think Ge Andong (戈安東) sounds better than An Dongni (安東尼), another Chinese name I got from another teacher (based just on the sound of my first name).
I´d like to know if 戈安東 is a good Chinese name (meaning and sound), and if you native Chinese speakers have any other suggestion for a good Chinese name, because I am willing to make a new seal for me with my name on it.
By the way, my girlfriend´s name is Suelen, and I gave her the name Su Ailian (蘇愛蓮), or "the lotus that revives the love". Do you think it´s a good sounding name?
Thanks in advance!
With that said, Ge Andong 戈安東 is a very good name. As an option, you can also use the surname 武 Wǔ which means military-related, martial... etc. For example 武士 Wushi means Warrior, 武術 Wushu means Martial Arts. As far as your given name, 安東 Andong is a very good name, it literally means "Peace East" or "Peaceful East", but it seems a tad strange because it's almost like chopping your original name in 2/3 as it's missing the last syllable. But as of right now I don't have any suggestions. Since "Anthony" means invaluable, which would translate as 無價 Wujia in Chinese, but it seems strange to use as a given name and "Wu Wujia" is a mouthful lol
I like your girlfriend's name.