Question of phonetic. Juncken 1780's PA

Hello,

I did researches on some Loyalists from Germantown (PA) who ended up in Quebec City in the 1780's (Jeffries, Shoemaker, Biker, Ekhardt, etc.)

One of them was Henry Juncken, a German from Wurtemberg who settled in Philadelphia in the 1750's.

Not being English nor German speaking, I still wonder if I'm right in assuming that those patronyms (Younkin and Juncken) sound the same in those languages. Are they?

You see, I found no relatives of this Juncken, even if he had some in Philadelphia. I thought maybe the name changed from one patronym to the other? If so, I could extend my research to the Younkin patronym as well.

Well, if anyone can help me figure it out about the patronyms phonetic here or any other information, I would be very gratefull.

Thanks,
Marcelle Cinq-Mars