ブレニム系（ブレニムけい、）は、馬（主にサラブレッド）の父系（父方の系図）の1つ。
サイアーライン
Darley Arabian 1700 Bartlet's Childers 1716 Squirt 1732 Marske 1750 Eclipse 1764 ---←エクリプス系へ戻る Potoooooooo 1773 Waxy 1790 Whalebone 1807 Sir Hercules 1826 Birdcatcher 1833 Oxford 1857 Sterling 1868 Isonomy 1875 Isinglass 1890 John o'Gaunt 1901 Swynford 1907 Blandford 1919 ---←ブランドフォード系へ戻る Blenheim II 1927 ---↓ブレニム系（改行）
---↓ブレニム系---
Blenheim II 1927 Hilltown 1932 Valdina Orphan 1939 Pampeiro 1932 Precotant 1940 Mahmoud 1933 ---→マームード系へ Wyndham 1933 Chantry 1943 Daily Mail 1943 Windy City II 1949 Beach City 1955 Old Pueblo 1955 Oldie 1961 Wee Folk 1961 Page 1965 Tombstone 1955 Slade 1963 Restless Wind 1956 On Your Mark 1964 Mandrake Major 1974 Major Jacko 1983 Marking Time 1978 Marktingo 1978 Racing Room 1964 Commanding Lead 1971 Restless Song 1964 Tumble Wind 1964 Tumbledownwind 1975 Drumalis 1980 Horage 1980 Mister Majestic 1984 Lugana Beach 1986 Errant Zephyr 1967 Iron Anthony 1967 Speedy Zephyr 1968 Windjammer 1969 El Muleta 1975 Scrupules 1980 Restless Jet 1970 Soberbo 1990 True Wind 1971 Billion 1974 Duke Wayne 1974 Dirty Shoes Hal 1976 Johnny o'Day 1977 Rossini 1977 Windy Sea 1957 Little Big Bad 1972 Touch of Style 1973 City Line 1960 Spotted Line 1967 Cari County 1970 Cari Jill Hajji 1983 Icy Line 1970 Bolide 1933 Donatello II 1934 ---→ドナテッロ系へ Le Grand Duc 1934 Bidar 1934 Domenico Ghirlandaio 1935 Khan Bahadur 1935 Economical 1942 Byland 1947 Marlborough 1935 Mirza 1935 Saint Amour 1940 Northern Star 1948 Hastings 1936 War Lord 1937 Whirlaway 1938 Whirling Home 1949 Kurun 1952 Whiranek 1952 Blandisher 1939 Patriot 1939 Ramillies 1939 Ram o' War 1950 Star Beacon 1939 Thumbs Up 1939 Selector 1947 Sedgemoor 1940 Star Blen 1940 *ビツグヴイ Big V 1941 Full Stride 1942 Air Hero 1943 Cientifico 1943 Fervent 1944 Rockcastle 1952 Jet Pilot 1944 Jet Jewel 1949 Pollux 1961 Watawopper 1969 Princenesian 1976 Jet Master 1949 Jet's Date 1949 Smart Apple 1950 Jet Action 1951 Hot Dust 1960 Petrarque 1971 El Oriental 1972 Jolly Jet 1963 Jolly Good 1972 Jet General 1951 Jet's Alibi 1955 Jet Fuel 1956 Pilot 1956 Bronze Jet 1958 Ad Majora 1966 Cousin Ken 1958 Jets Pat 1958 Shavetail 1958 Noble Creek 1944 Fly Away 1945 Free America 1945 Correlation 1951 Mr. Correlation 1969 'Tis of Thee 1951 Democratic 1953 Rose Beam 1945 Bryan G. 1947 Yemen 1955 Ross Sea 1958 Battle Morn 1948 Blentigo 1948 Saratoga 1952
サイアーライン上は全て種牡馬もしくは種牡馬入りを発表した馬。