I agree with the general consensus in the comments. A few alternatives:
[name_f][/name_f][name_m]Ignacius[/name_m] nn [name_m]Iggy[/name_m]
[name_f][/name_f][name_m]Icarus[/name_m] nn [name_m]Russ[/name_m]
[name_f][/name_f][name_m]Sylvan[/name_m]
[name_f][/name_f][name_m]Sylvester[/name_m]
[name_f][/name_f][name_f]Amaryllis[/name_f]