First thing I would like to do is that the Castlevaina Dungeon for giving the info for this story to be updated by way the story line goes, so a special thanks to the makers of Castlevaina Dungeon. 

Next I will put the story line (somewhat) in the way it is suppose to go. Like the first Belmont to go against Dracula was Sonia Belmont.  It's mostly a timeline but other than that it's kinda like a story line.  I will put time intervals, between the years Dracula came back to the world of the living and some of the other hero's before 1832 where my story takes place, and I will also put the Belmont line after 1832 just for the fun of it, I will also put the relations for the Belmont's in which I believe is correct, like mothers, fathers, etc. So one with it

Belmont Clan

1450- Sonia Belmont   

1450-1476= 26 years

1476- Trevor Belmont

1476-1576= 100 years

1576+1591- Christopher Belmont

1576-1591= 15 years

1691+1698- Simon Belmont

1691-1698= 7 years

1698-1748= 50 years

1748- Juste Belmont

1748-1788= 40 years

1788+1792- Richter Belmont

1792-1830= 39 years

1830- Nathan Graves (not part of the Belmont line)

*note Nathan is in the other hero's department.*

*1792-1852= 60 years*

Other Hero's before 1830

1476+1792- Alucard

1476-Sypha Belnades

1476- Grant DaNasty

1748- Maxim Kishine

1788+1792- Maria Renard

Extras before and in 1830

1830- Hugh Baldwin

1830- Morris Baldwin

1748- Lydie Erlanger

Belmont clan after 1830

1830-1852= 22 years

1852- Reinhart Schneider

1852-1917= 65 years

1917- John Morris

Other Hero's after 1830

1844- Cornell

1852- Carrie Fernandez

1852- Henry Oldrey

1917- Eric Lecarde

Other Members of the Belmont clan

Sypha Belnades

Alucard

Rosa

Solieyu Belmont

Annette Renard Belmont

Lydie Erlanger

Maria Renard

Carrie Fernandez

Quincey Morris

*note: I believe most of them did get married into the family or got into the family through Sypha*

Relations

Sonia mother of Trevor, lover of Alucard

Trevor son of Sonia and Alucard, husband of Sypha

Christopher great-grandson to Trevor, father of Solieyu

Soleiyu grandfather to Simon

Simon great-grandson to Christopher

Juste grandson to Simon

Lydie possibly the wife of Juste

Maxim friend to Belmont clan

Richter son of Juste (and Lydie, maybe)

Annette wife of Richter

Maria sister-in-law to Richter

Reinhart great-grandson to Richter

Rosa lover (wife) to Reinhart

Carrie related through Sypha

Quincey great-grandson to Reinhart

John son of Quincey

If you want to see the story line for the games and the mix with Bram Strokers Dracula I would suggest going to the Castlevaina Dungeon it is an excellent website for Castlevaina fans out there!

Here is the website if you ever want to check it out http://www.classicgaming.com/castlevania/dungeon.htm