Some examples of mixing Slavic and Germanic or Latin names are: Mijoman, Vukman and Radoman. I also always wondered what this "man" means. thank you for explanation
when it comes to Germanic influence,all tested males of Drobnjaci clan carrie I1 which is Germanic y-dna haplogroup, Norman i their case. While brotherhood Macura is also I1, but Ostrogoth subclade.
I will have to check if some of the tested Mandić males carrie this haplogroup.

What is your source about haplogroups?