Respondents: 59 (This poll is closed)
I forgot [name_m]Hob[/name_m], Hobb, and [name_m]Hobbes[/name_m].
You forgot [name_m]Rupert[/name_m].
There’s also Hopcyn/Hopkin and Brecht.
Yes, I did. [name_m]Rupert[/name_m], alas, reminds me of Murdoch, but [name_m]Ruprecht[/name_m] I fancy. 
Hopkin is cute, if a bit bunny-like, but Brecht is great.
I’m fond of [name_u]Robin[/name_u] and [name_u]Bertie[/name_u].
From the other suggestions, I think Hopkin/Hopcyn, [name_m]Hob[/name_m] and Brecht/Brechtje are sweet…
The Finnish [name_m]Pertti[/name_m] is quite appealing too. Other [name_m]Robert[/name_m] nicknames include [name_m]Rabbie[/name_m]/[name_m]Rab[/name_m] (Scottish).
Roparhz is apparently a Cornish form, [name_m]Raibeart[/name_m] a Scottish version, Roibeárd an Irish form and Robrecht is Dutch.
I wouldn’t think of [name_m]Bertram[/name_m] as a [name_m]Robert[/name_m] variant, but I do like it. I also like [name_m]Bertrand[/name_m], [name_m]Albert[/name_m]/[name_m]Albrecht[/name_m] and [name_m]Wilbert[/name_m].
Some more ‘bert’ names: [name_m]Berthold[/name_m], Hildebert, [name_m]Gilbert[/name_m], [name_m]Norbert[/name_m], [name_m]Herbert[/name_m], [name_m]Hubert[/name_m], [name_m]Filbert[/name_m], [name_m]Fulbert[/name_m], [name_m]Colbert[/name_m], [name_m]Osbert[/name_m], Siegbert/Sigibert, [name_m]Egbert[/name_m], [name_m]Humbert[/name_m]/[name_m]Umberto[/name_m], [name_m]Lambert[/name_m] and Wybert.
I absolutely love [name_u]Robin[/name_u]. It’s so sweet, handsome, soft, and adventurous.
I also think [name_u]Bertie[/name_u], [name_m]Rupert[/name_m], and [name_m]Hobbes[/name_m] are adorable!
I too love [name_m]Albert[/name_m] and [name_m]Albrecht[/name_m]. Such solid names. And I am fond of the bert names. [name_m]Robert[/name_m] is my dad’s name and a name used in every generation of his family so I am fond of it. I’m also drawn to names with many nickname potentials.