On Penny Dreadful, who plays Victor Frankenstein's father at the funeral of Victor's mother?

Well this took some digging and I am not 100% sure of my answer! However, I will give it a go...
There is no actor listed for, or indeed no role listed for Victor Frankenstein's father, in every site that I have searched for "Penny Dreadful".
Episode 3, Season 1, is titled "Resurrection". One of the flashbacks scenes is Caroline Frankenstein dying. The only mention I could find of his father was in this scene....

[young Victor Frankenstein watches his mother as she lays dying in her bed]

Young Victor : [young Victor asks his father] Will she die today?

Alphonse : No, no, lad. Of course not.

Young Victor : Death is not serene.

I am assuming that "Alphonse" is his father.
Alphonse is was played by an Irish actor, Anthony Brophy.

https://www.imdb.com/title/tt2991730/characters/nm0112390?ref_=ttfc_fc_cl_t15
https://en.wikipedia.org/wiki/List_of_Penny_Dreadful_episodes#Season_1_(2014)
http://penny-dreadful.wikia.com/wiki/Resurrection
https://www.imdb.com/title/tt2991730/
https://www.imdb.com/name/nm0112390/bio
https://www.independent.ie/life/my-cultural-life-anthony-brophy-34631251.html