Hi,  

Here are some Coplen(/Coplin) marriages:
Essex Marriages
town,fname1 ,sname1 , fname2, sname2, Parishes, Dates 
Widdington William COPLIN Mary SIMONS    1802   
Widdington William COPLIN Sarah PARRISH    1803   
and some 
Chidicks/Chittock from 1851 (HO107):
record census fname lname piece folio parish age born birth 
90413 Tendring SUSAN CHIDDOCK 129 GBT WIVENHOE 80 ESS 1771 
90414 Tendring WILLIAM CHIDDOCK 129 GBT GT BENTLEY 73 ESS 1778 
27283 Billericay SAMUEL CHIDICKS LND 396 CANNEWDON 26 ESS 1825
2174 Northern GEORGE CHITTOCK 1788 157 GST 9 ESS 1842 
2175 Northern ISABELLA CHITTOCK 1788 157 GST 23 ESS 1828 
2176 Northern WILLIAM CHITTOCK 1788 157 GST 31 SFK 1820 
2177 Northern WILLIAM CHITTOCK 1788 157 GST 3 ESS 1848 
53245 Witham JOSEPH G. CHITTOCK KVD 58 EARLS COLNE 44 ESS 1807 
53246 Witham MELINDA CHITTOCK KVD 58 EARSHAM 39 NFK 1812 
and in 1861 Billericay (RG9):
Surname   Forename(s)   Age   dwm   Piece   Folio   Parish
CHITTICKS   ELIZABETH   6      1077   14   NBF
CHITTICKS   EMILY   3      1077   15   NBF
CHITTICKS   EMMA   25      1077   14   NBF
CHITTICKS   JOHN   28      1077   14   NBF
CHITTICKS   MARIA   22      1077   15   NBF
CHITTICKS   WILLIAM   26      1077   15   NBF
CHITTOCK   GEORGE   23      1075   45   BRW
and from Barking (1861):
Surname   Forenames   Age   dwm   Piece   Folio   Parish
CHITTOCK   EDGAR   25      1058   56   EHM
and from Suffolk in 1841:
Chelmondiston 1841 Census data - including dates and links
Record  Place Name Surname Maiden Name Age Trade 
254  Mary Chittock   65 Independent 
Washbrook 1841 Census data for Suffolk.
Record  Abode Name Surname Age Trade
406  William Chittock 25 
The other names are very common so some more info would really be useful please?  

Lol,
Geoff.